diff --git a/code/__DEFINES/atmospherics.dm b/code/__DEFINES/atmospherics.dm
index 18474f555c3..4ed7e668c75 100644
--- a/code/__DEFINES/atmospherics.dm
+++ b/code/__DEFINES/atmospherics.dm
@@ -212,6 +212,20 @@
 /// The modifier on cold damage hulks get.
 #define HULK_COLD_DAMAGE_MOD 2
 
+// Body temperature warning icons
+/// The temperature the red icon is displayed.
+#define BODYTEMP_HEAT_WARNING_3 (BODYTEMP_HEAT_DAMAGE_LIMIT + 360) //+700k
+/// The temperature the orange icon is displayed.
+#define BODYTEMP_HEAT_WARNING_2 (BODYTEMP_HEAT_DAMAGE_LIMIT + 120) //460K
+/// The temperature the yellow icon is displayed.
+#define BODYTEMP_HEAT_WARNING_1 (BODYTEMP_HEAT_DAMAGE_LIMIT) //340K
+/// The temperature the light green icon is displayed.
+#define BODYTEMP_COLD_WARNING_1 (BODYTEMP_COLD_DAMAGE_LIMIT) //270k
+/// The temperature the cyan icon is displayed.
+#define BODYTEMP_COLD_WARNING_2 (BODYTEMP_COLD_DAMAGE_LIMIT - 70) //200k
+/// The temperature the blue icon is displayed.
+#define BODYTEMP_COLD_WARNING_3 (BODYTEMP_COLD_DAMAGE_LIMIT - 150) //120k
+
 /// what min_cold_protection_temperature is set to for space-helmet quality headwear. MUST NOT BE 0.
 #define SPACE_HELM_MIN_TEMP_PROTECT 2.0
 /// Thermal insulation works both ways /Malkevin
diff --git a/code/datums/greyscale/config_types/greyscale_configs.dm b/code/datums/greyscale/config_types/greyscale_configs.dm
index fbfef1ad55d..0b06cd82ae6 100644
--- a/code/datums/greyscale/config_types/greyscale_configs.dm
+++ b/code/datums/greyscale/config_types/greyscale_configs.dm
@@ -338,6 +338,16 @@
 	icon_file = 'icons/obj/stack_objects.dmi'
 	json_config = 'code/datums/greyscale/json_configs/wrap_paper.json'
 
+/datum/greyscale_config/meter
+	name = "Meter"
+	icon_file = 'icons/obj/atmospherics/pipes/meter.dmi'
+	json_config = 'code/datums/greyscale/json_configs/meter.json'
+
+/datum/greyscale_config/thermomachine
+	name = "Thermomachine"
+	icon_file = 'icons/obj/atmospherics/components/thermomachine.dmi'
+	json_config = 'code/datums/greyscale/json_configs/thermomachine.json'
+
 /datum/greyscale_config/janicart_upgrade
 	name = "Janicart Upgrade"
 	icon_file = 'icons/obj/janicart_upgrade.dmi'
diff --git a/code/datums/greyscale/json_configs/meter.json b/code/datums/greyscale/json_configs/meter.json
new file mode 100644
index 00000000000..3acd68b6f72
--- /dev/null
+++ b/code/datums/greyscale/json_configs/meter.json
@@ -0,0 +1,375 @@
+{
+	"meter": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure0",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter0": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure0",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons0",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter1_1": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure1_1",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons1",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter1_2": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure1_2",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons1",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter1_3": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure1_3",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons1",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter1_4": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure1_4",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons1",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter1_5": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure1_5",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons1",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter1_6": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure1_6",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons1",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter2_1": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure2_1",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons2",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter2_2": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure2_2",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons2",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter2_3": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure2_3",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons2",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter2_4": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure2_4",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons2",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter2_5": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure2_5",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons2",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter2_6": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure2_6",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons2",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter3_1": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure3_1",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons3",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter3_2": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure3_2",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons3",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter3_3": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure3_3",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons3",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter3_4": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure3_4",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons3",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter3_5": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure3_5",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons3",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter3_6": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure3_6",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons3",
+			"blend_mode": "overlay"
+		}
+	],
+	"meter4": [
+		{
+			"type": "icon_state",
+			"icon_state": "pressure4",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "meter_base",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "buttons4",
+			"blend_mode": "overlay"
+		}
+	]
+}
diff --git a/code/datums/greyscale/json_configs/thermomachine.json b/code/datums/greyscale/json_configs/thermomachine.json
new file mode 100644
index 00000000000..ee939c95ef1
--- /dev/null
+++ b/code/datums/greyscale/json_configs/thermomachine.json
@@ -0,0 +1,59 @@
+{
+	"thermo_0": [
+		{
+			"type": "icon_state",
+			"icon_state": "temp_meter",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "thermo_base",
+			"blend_mode": "overlay"
+		}
+	],
+	"thermo_1": [
+		{
+			"type": "icon_state",
+			"icon_state": "temp_meter_1",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "thermo_base_1",
+			"blend_mode": "overlay"
+		}
+	],
+	"thermo_1_blinking": [
+		{
+			"type": "icon_state",
+			"icon_state": "temp_meter_1",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "blinking",
+			"blend_mode": "overlay"
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "thermo_base_1",
+			"blend_mode": "overlay"
+		}
+	],
+	"thermo-open": [
+		{
+			"type": "icon_state",
+			"icon_state": "temp_meter-o",
+			"blend_mode": "overlay",
+			"color_ids": [ 1 ]
+		},
+		{
+			"type": "icon_state",
+			"icon_state": "thermo_base-o",
+			"blend_mode": "overlay"
+		}
+	]
+}
diff --git a/code/modules/atmospherics/machinery/airalarm.dm b/code/modules/atmospherics/machinery/airalarm.dm
index a3b4c968fd1..232423d497c 100644
--- a/code/modules/atmospherics/machinery/airalarm.dm
+++ b/code/modules/atmospherics/machinery/airalarm.dm
@@ -85,7 +85,7 @@
 
 	var/list/TLV = list( // Breathable air.
 		"pressure" = new/datum/tlv(HAZARD_LOW_PRESSURE, WARNING_LOW_PRESSURE, WARNING_HIGH_PRESSURE, HAZARD_HIGH_PRESSURE), // kPa. Values are min2, min1, max1, max2
-		"temperature" = new/datum/tlv(T0C, T0C+10, T0C+40, T0C+66),
+		"temperature" = new/datum/tlv(BODYTEMP_COLD_WARNING_1, BODYTEMP_COLD_WARNING_1+10, BODYTEMP_HEAT_WARNING_1-27, BODYTEMP_HEAT_WARNING_1),
 		/datum/gas/oxygen = new/datum/tlv(16, 19, 135, 140), // Partial pressure, kpa
 		/datum/gas/nitrogen = new/datum/tlv(-1, -1, 1000, 1000),
 		/datum/gas/carbon_dioxide = new/datum/tlv(-1, -1, 5, 10),
diff --git a/code/modules/atmospherics/machinery/components/binary_devices/thermomachine.dm b/code/modules/atmospherics/machinery/components/binary_devices/thermomachine.dm
index c3c883c4376..b80c6f2e304 100644
--- a/code/modules/atmospherics/machinery/components/binary_devices/thermomachine.dm
+++ b/code/modules/atmospherics/machinery/components/binary_devices/thermomachine.dm
@@ -2,7 +2,7 @@
 
 /obj/machinery/atmospherics/components/binary/thermomachine
 	icon = 'icons/obj/atmospherics/components/thermomachine.dmi'
-	icon_state = "freezer"
+	icon_state = "thermo_base"
 
 	name = "Temperature control unit"
 	desc = "Heats or cools gas in connected pipes."
@@ -19,11 +19,10 @@
 	vent_movement = NONE
 	pipe_flags = PIPING_ONE_PER_TURF
 
-	set_dir_on_move = FALSE
+	greyscale_config = /datum/greyscale_config/thermomachine
+	greyscale_colors = COLOR_VIBRANT_LIME
 
-	var/icon_state_off = "freezer"
-	var/icon_state_on = "freezer_1"
-	var/icon_state_open = "freezer-o"
+	set_dir_on_move = FALSE
 
 	var/min_temperature = T20C //actual temperature will be defined by RefreshParts() and by the cooling var
 	var/max_temperature = T20C //actual temperature will be defined by RefreshParts() and by the cooling var
@@ -81,35 +80,43 @@
 
 
 /obj/machinery/atmospherics/components/binary/thermomachine/update_icon_state()
-	if(cooling)
-		icon_state_off = "freezer"
-		icon_state_on = "freezer_1"
-		icon_state_open = "freezer-o"
-	else
-		icon_state_off = "heater"
-		icon_state_on = "heater_1"
-		icon_state_open = "heater-o"
+	switch(target_temperature)
+		if(BODYTEMP_HEAT_WARNING_3 to INFINITY)
+			greyscale_colors = COLOR_RED
+		if(BODYTEMP_HEAT_WARNING_2 to BODYTEMP_HEAT_WARNING_3)
+			greyscale_colors = COLOR_ORANGE
+		if(BODYTEMP_HEAT_WARNING_1 to BODYTEMP_HEAT_WARNING_2)
+			greyscale_colors = COLOR_YELLOW
+		if(BODYTEMP_COLD_WARNING_1 to BODYTEMP_HEAT_WARNING_1)
+			greyscale_colors = COLOR_VIBRANT_LIME
+		if(BODYTEMP_COLD_WARNING_2 to BODYTEMP_COLD_WARNING_1)
+			greyscale_colors = COLOR_CYAN
+		if(BODYTEMP_COLD_WARNING_3 to BODYTEMP_COLD_WARNING_2)
+			greyscale_colors = COLOR_BLUE
+		else
+			greyscale_colors = COLOR_VIOLET
+
+	set_greyscale(colors=greyscale_colors)
+
 	if(panel_open)
-		icon_state = icon_state_open
+		icon_state = "thermo-open"
 		return ..()
 	if(on && is_operational)
-		icon_state = icon_state_on
+		if(skipping_work)
+			icon_state = "thermo_1_blinking"
+		else
+			icon_state = "thermo_1"
 		return ..()
-	icon_state = icon_state_off
+	icon_state = "thermo_0"
 	return ..()
 
 /obj/machinery/atmospherics/components/binary/thermomachine/update_overlays()
 	. = ..()
-	//Doesn't check if the pipes are intact
-	var/mutable_appearance/pipe_appearance1 = mutable_appearance('icons/obj/atmospherics/pipes/pipe_underlays.dmi', "intact_[dir]_[piping_layer]", layer = GAS_SCRUBBER_LAYER)
-	pipe_appearance1.color = COLOR_LIME
-	var/mutable_appearance/pipe_appearance2 = mutable_appearance('icons/obj/atmospherics/pipes/pipe_underlays.dmi', "intact_[turn(dir, 180)]_[piping_layer]", layer = GAS_SCRUBBER_LAYER)
-	pipe_appearance2.color = COLOR_MOSTLY_PURE_RED
-	. += pipe_appearance1
-	. += pipe_appearance2
-	if(skipping_work && on)
-		var/mutable_appearance/skipping = mutable_appearance(icon, "blinking")
-		. += skipping
+	if(!initial(icon))
+		return
+	var/mutable_appearance/thermo_overlay = new(initial(icon))
+	. += getpipeimage(thermo_overlay, "pipe", dir, COLOR_LIME, piping_layer)
+	. += getpipeimage(thermo_overlay, "pipe", turn(dir, 180), COLOR_MOSTLY_PURE_RED, piping_layer)
 
 /obj/machinery/atmospherics/components/binary/thermomachine/examine(mob/user)
 	. = ..()
@@ -237,7 +244,7 @@
 		if(!anchored)
 			to_chat(user, span_notice("Anchor [src] first!"))
 			return
-		if(default_deconstruction_screwdriver(user, icon_state_open, icon_state_off, item))
+		if(default_deconstruction_screwdriver(user, "thermo-open", "thermo-0", item))
 			change_pipe_connection(panel_open)
 			return
 	if(default_change_direction_wrench(user, item))
@@ -451,15 +458,11 @@
 	. = ..()
 
 /obj/machinery/atmospherics/components/binary/thermomachine/freezer
-	icon_state = "freezer"
-	icon_state_off = "freezer"
-	icon_state_on = "freezer_1"
-	icon_state_open = "freezer-o"
 	cooling = TRUE
 
 /obj/machinery/atmospherics/components/binary/thermomachine/freezer/on
 	on = TRUE
-	icon_state = "freezer_1"
+	icon_state = "thermo_base_1"
 
 /obj/machinery/atmospherics/components/binary/thermomachine/freezer/on/Initialize()
 	. = ..()
@@ -468,20 +471,19 @@
 
 /obj/machinery/atmospherics/components/binary/thermomachine/freezer/on/coldroom
 	name = "Cold room temperature control unit"
+	icon_state = "thermo_base_1"
+	greyscale_colors = COLOR_CYAN
+	cooling = TRUE
 
 /obj/machinery/atmospherics/components/binary/thermomachine/freezer/on/coldroom/Initialize()
 	. = ..()
 	target_temperature = COLD_ROOM_TEMP
 
 /obj/machinery/atmospherics/components/binary/thermomachine/heater
-	icon_state = "heater"
-	icon_state_off = "heater"
-	icon_state_on = "heater_1"
-	icon_state_open = "heater-o"
 	cooling = FALSE
 
 /obj/machinery/atmospherics/components/binary/thermomachine/heater/on
 	on = TRUE
-	icon_state = "heater_1"
+	icon_state = "thermo_base_1"
 
 #undef THERMOMACHINE_SAFE_TEMPERATURE
diff --git a/code/modules/atmospherics/machinery/other/meter.dm b/code/modules/atmospherics/machinery/other/meter.dm
index 8ded7e1e25f..3e3995dee6b 100644
--- a/code/modules/atmospherics/machinery/other/meter.dm
+++ b/code/modules/atmospherics/machinery/other/meter.dm
@@ -2,7 +2,7 @@
 	name = "gas flow meter"
 	desc = "It measures something."
 	icon = 'icons/obj/atmospherics/pipes/meter.dmi'
-	icon_state = "meterX"
+	icon_state = "meter_base"
 	layer = HIGH_PIPE_LAYER
 	power_channel = AREA_USAGE_ENVIRON
 	use_power = IDLE_POWER_USE
@@ -13,6 +13,8 @@
 	var/frequency = 0
 	var/atom/target
 	var/target_layer = PIPING_LAYER_DEFAULT
+	greyscale_config = /datum/greyscale_config/meter
+	greyscale_colors = COLOR_GRAY
 
 /obj/machinery/meter/atmos
 	frequency = FREQ_ATMOS_STORAGE
@@ -59,18 +61,22 @@
 
 /obj/machinery/meter/process_atmos()
 	if(!(target?.flags_1 & INITIALIZED_1))
-		icon_state = "meterX"
+		icon_state = "meter0"
+		greyscale_colors = COLOR_GRAY
+		set_greyscale(colors=greyscale_colors)
 		return FALSE
 
 	if(machine_stat & (BROKEN|NOPOWER))
-		icon_state = "meter0"
+		icon_state = "meter"
+		greyscale_colors = COLOR_GRAY
+		set_greyscale(colors=greyscale_colors)
 		return FALSE
 
 	use_power(5)
 
 	var/datum/gas_mixture/environment = target.return_air()
 	if(!environment)
-		icon_state = "meterX"
+		icon_state = "meter0"
 		return FALSE
 
 	var/env_pressure = environment.return_pressure()
@@ -88,6 +94,27 @@
 	else
 		icon_state = "meter4"
 
+	var/env_temperature = environment.temperature
+	if(env_pressure == 0 || env_temperature == 0)
+		greyscale_colors = COLOR_GRAY
+	else
+		switch(env_temperature)
+			if(BODYTEMP_HEAT_WARNING_3 to INFINITY)
+				greyscale_colors = COLOR_RED
+			if(BODYTEMP_HEAT_WARNING_2 to BODYTEMP_HEAT_WARNING_3)
+				greyscale_colors = COLOR_ORANGE
+			if(BODYTEMP_HEAT_WARNING_1 to BODYTEMP_HEAT_WARNING_2)
+				greyscale_colors = COLOR_YELLOW
+			if(BODYTEMP_COLD_WARNING_1 to BODYTEMP_HEAT_WARNING_1)
+				greyscale_colors = COLOR_VIBRANT_LIME
+			if(BODYTEMP_COLD_WARNING_2 to BODYTEMP_COLD_WARNING_1)
+				greyscale_colors = COLOR_CYAN
+			if(BODYTEMP_COLD_WARNING_3 to BODYTEMP_COLD_WARNING_2)
+				greyscale_colors = COLOR_BLUE
+			else
+				greyscale_colors = COLOR_VIOLET
+	set_greyscale(colors=greyscale_colors)
+
 	if(frequency)
 		var/datum/radio_frequency/radio_connection = SSradio.return_frequency(frequency)
 
diff --git a/code/modules/mob/living/carbon/human/species.dm b/code/modules/mob/living/carbon/human/species.dm
index 85b437a418a..fe0d1a693e1 100644
--- a/code/modules/mob/living/carbon/human/species.dm
+++ b/code/modules/mob/living/carbon/human/species.dm
@@ -1683,9 +1683,9 @@ GLOBAL_LIST_EMPTY(roundstart_races)
 		humi.remove_movespeed_modifier(/datum/movespeed_modifier/cold)
 		// display alerts based on how hot it is
 		switch(humi.bodytemperature)
-			if(0 to 460)
+			if(bodytemp_heat_damage_limit to BODYTEMP_HEAT_WARNING_2)
 				humi.throw_alert("temp", /atom/movable/screen/alert/hot, 1)
-			if(461 to 700)
+			if(BODYTEMP_HEAT_WARNING_2 to BODYTEMP_HEAT_WARNING_3)
 				humi.throw_alert("temp", /atom/movable/screen/alert/hot, 2)
 			else
 				humi.throw_alert("temp", /atom/movable/screen/alert/hot, 3)
@@ -1699,9 +1699,9 @@ GLOBAL_LIST_EMPTY(roundstart_races)
 		humi.add_or_update_variable_movespeed_modifier(/datum/movespeed_modifier/cold, multiplicative_slowdown = ((bodytemp_cold_damage_limit - humi.bodytemperature) / COLD_SLOWDOWN_FACTOR))
 		// Display alerts based how cold it is
 		switch(humi.bodytemperature)
-			if(201 to bodytemp_cold_damage_limit)
+			if(BODYTEMP_COLD_WARNING_2 to bodytemp_cold_damage_limit)
 				humi.throw_alert("temp", /atom/movable/screen/alert/cold, 1)
-			if(120 to 200)
+			if(BODYTEMP_COLD_WARNING_3 to BODYTEMP_COLD_WARNING_2)
 				humi.throw_alert("temp", /atom/movable/screen/alert/cold, 2)
 			else
 				humi.throw_alert("temp", /atom/movable/screen/alert/cold, 3)
diff --git a/icons/obj/atmospherics/components/thermomachine.dmi b/icons/obj/atmospherics/components/thermomachine.dmi
index ad3d5e44546..6c148c38973 100644
Binary files a/icons/obj/atmospherics/components/thermomachine.dmi and b/icons/obj/atmospherics/components/thermomachine.dmi differ
diff --git a/icons/obj/atmospherics/pipes/meter.dmi b/icons/obj/atmospherics/pipes/meter.dmi
index c4cc27d78c4..2816d22f439 100644
Binary files a/icons/obj/atmospherics/pipes/meter.dmi and b/icons/obj/atmospherics/pipes/meter.dmi differ