Adds in the option to color all synth parts and two sets of parts

As the titles says

code/modules/client/preference_setup/general/03_body.dm

@@ -29,6 +29,10 @@ var/global/list/valid_bloodtypes = list("A+", "A-", "B+", "B-", "AB+", "AB-", "O
 	S["organ_data"]			>> pref.organ_data
 	S["rlimb_data"]			>> pref.rlimb_data
 	S["body_markings"]		>> pref.body_markings
+	S["synth_color"]		>> pref.synth_color
+	S["synth_red"]			>> pref.r_synth
+	S["synth_green"]		>> pref.g_synth
+	S["synth_blue"]			>> pref.b_synth
 	pref.preview_icon = null
 
 /datum/category_item/player_setup_item/general/body/save_character(var/savefile/S)
@@ -53,6 +57,10 @@ var/global/list/valid_bloodtypes = list("A+", "A-", "B+", "B-", "AB+", "AB-", "O
 	S["organ_data"]			<< pref.organ_data
 	S["rlimb_data"]			<< pref.rlimb_data
 	S["body_markings"]		<< pref.body_markings
+	S["synth_color"]		<< pref.synth_color
+	S["synth_red"]			<< pref.r_synth
+	S["synth_green"]		<< pref.g_synth
+	S["synth_blue"]			<< pref.b_synth
 
 /datum/category_item/player_setup_item/general/body/sanitize_character(var/savefile/S)
 	if(!pref.species || !(pref.species in playable_species))
@@ -101,6 +109,10 @@ var/global/list/valid_bloodtypes = list("A+", "A-", "B+", "B-", "AB+", "AB-", "O
 	character.h_style	= pref.h_style
 	character.f_style	= pref.f_style
 	character.b_type	= pref.b_type
+	character.synth_color = pref.synth_color
+	character.r_synth	= pref.r_synth
+	character.g_synth	= pref.g_synth
+	character.b_synth	= pref.b_synth
 
 	// Destroy/cyborgize organs and limbs.
 	for(var/name in list(BP_HEAD, BP_L_HAND, BP_R_HAND, BP_L_ARM, BP_R_ARM, BP_L_FOOT, BP_R_FOOT, BP_L_LEG, BP_R_LEG, BP_GROIN, BP_TORSO))
@@ -284,6 +296,11 @@ var/global/list/valid_bloodtypes = list("A+", "A-", "B+", "B-", "AB+", "AB-", "O
 		. += "<font face='fixedsys' size='3' color='[pref.body_markings[M]]'><table style='display:inline;' bgcolor='[pref.body_markings[M]]'><tr><td>__</td></tr></table></font>"
 		. += "<br>"
 
+	. += "<br>"
+	. += "<b>Allow Synth color:</b> <a href='?src=\ref[src];synth_color=1'><b>[pref.synth_color ? "Yes" : "No"]</b></a><br>"
+	if(pref.synth_color)
+		. += "<a href='?src=\ref[src];synth2_color=1'>Change Color</a> <font face='fixedsys' size='3' color='#[num2hex(pref.r_synth, 2)][num2hex(pref.g_synth, 2)][num2hex(pref.b_synth, 2)]'><table style='display:inline;' bgcolor='#[num2hex(pref.r_synth, 2)][num2hex(pref.g_synth, 2)][num2hex(pref.b_synth)]'><tr><td>__</td></tr></table></font> "
+
 	. = jointext(.,null)
 
 /datum/category_item/player_setup_item/general/body/proc/has_flag(var/datum/species/mob_species, var/flag)
@@ -665,6 +682,18 @@ var/global/list/valid_bloodtypes = list("A+", "A-", "B+", "B-", "AB+", "AB-", "O
 		pref.equip_preview_mob ^= text2num(href_list["toggle_preview_value"])
 		return TOPIC_REFRESH_UPDATE_PREVIEW
 
+	else if(href_list["synth_color"])
+		pref.synth_color = !pref.synth_color
+		return TOPIC_REFRESH_UPDATE_PREVIEW
+
+	else if(href_list["synth2_color"])
+		var/new_color = input(user, "Choose your character's synth colour: ", "Character Preference", rgb(pref.r_synth, pref.g_synth, pref.b_synth)) as color|null
+		if(new_color && CanUseTopic(user))
+			pref.r_synth = hex2num(copytext(new_color, 2, 4))
+			pref.g_synth = hex2num(copytext(new_color, 4, 6))
+			pref.b_synth = hex2num(copytext(new_color, 6, 8))
+			return TOPIC_REFRESH_UPDATE_PREVIEW
+
 	return ..()
 
 /datum/category_item/player_setup_item/general/body/proc/reset_limbs()

code/modules/client/preferences.dm

@@ -51,6 +51,10 @@ datum/preferences
 	var/list/language_prefixes = list() //Kanguage prefix keys
 	var/list/gear						//Custom/fluff item loadout.
 	var/list/traits						//Traits which modifier characters for better or worse (mostly worse).
+	var/synth_color	= 0					//Lets normally uncolorable synth parts be colorable.
+	var/r_synth							//Used with synth_color to color synth parts that normaly can't be colored.
+	var/g_synth							//Same as above
+	var/b_synth							//Same as above
 
 		//Some faction information.
 	var/home_system = "Unset"           //System of birth.

code/modules/mob/living/carbon/human/human_defines.dm

@@ -23,6 +23,12 @@
 	var/g_skin = 0
 	var/b_skin = 0
 
+	//Synth colors
+	var/synth_color	= 0					//Lets normally uncolorable synth parts be colorable.
+	var/r_synth							//Used with synth_color to color synth parts that normaly can't be colored.
+	var/g_synth							//Same as above
+	var/b_synth							//Same as above
+
 	var/size_multiplier = 1 //multiplier for the mob's icon size
 	var/damage_multiplier = 1 //multiplies melee combat damage
 	var/icon_update = 1 //whether icon updating shall take place

code/modules/organs/organ_icon.dm

@@ -19,6 +19,8 @@ var/global/list/limb_icon_cache = list()
 	if(robotic >= ORGAN_ROBOT)
 		var/datum/robolimb/franchise = all_robolimbs[model]
 		if(!(franchise && franchise.lifelike))
+			if(human.synth_color)
+				s_col = list(human.r_synth, human.g_synth, human.b_synth)
 			return
 	if(species && human.species && species.name != human.species.name)
 		return

code/modules/organs/robolimbs.dm

@@ -245,6 +245,20 @@ var/const/standard_monitor_styles = "blank=ipc_blank;\
 		green=xion_green;\
 		rgb=xion_rgb"
 
+/datum/robolimb/xion_alt3
+	company = "Xion - Whiteout"
+	desc = "This limb has a minimalist black and white casing."
+	icon = 'icons/mob/human_races/cyberlimbs/xion/xion_alt3.dmi'
+	unavailable_to_build = 1
+
+/datum/robolimb/xion_alt4
+	company = "Xion - Breach - Whiteout"
+	desc = "This limb has a minimalist black and white casing. Looks a bit menacing."
+	icon = 'icons/mob/human_races/cyberlimbs/xion/xion_alt4.dmi'
+	unavailable_to_build = 1
+	parts = list(BP_HEAD)
+
+
 /datum/robolimb/xion_monitor
 	company = "Xion Monitor"
 	desc = "Xion Mfg.'s unique spin on a popular prosthetic head model. It looks and minimalist and utilitarian."