Primitive Colorgrading (#17844)

* extremely basic color grading for areas

* fixes

* tint

* dmm

* colorgrading weather

* did it for the meme

* outdoor transition fix

code/modules/planet/weather.dm

@@ -160,6 +160,7 @@
 			if(!T.is_outdoors())
 				continue
 			to_chat(M, message)
+			M.update_client_color() // Passively done here instead of its own loop, the only issue is that if you enter an outdoor area to an indoor turf you won't get a blend update till your first message.
 
 /datum/weather_holder/proc/get_weather_datum(desired_type)
 	return allowed_weather_types[desired_type]
@@ -204,6 +205,8 @@
 	var/indoor_sounds_type = null
 	var/effect_flags = NONE
 
+	VAR_PRIVATE/color_grading = null // Color blending for weather to feel hotter, colder, or stranger
+
 /datum/weather/New()
 	if(outdoor_sounds_type)
 		outdoor_sounds = new outdoor_sounds_type(list(), FALSE, TRUE)
@@ -305,6 +308,10 @@
 		return
 	indoor_sounds.output_atoms -= M
 
+/// Gets a hex color value for blending with a player's client.color.
+/datum/weather/proc/get_color_tint()
+	return color_grading
+
 // All this does is hold the weather icon.
 /atom/movable/weather_visuals
 	icon = 'icons/effects/weather.dmi'