Allows animids to toggle between skintone and mutant colors

code/__DEFINES/mobs.dm

@@ -159,6 +159,7 @@
 #define BODYPART_ID_PSYKER "psyker"
 #define BODYPART_ID_MEAT "meat"
 #define BODYPART_ID_PEG "peg"
+#define BODYPART_ID_MUTANT "mutant"
 
 
 // Preferences for leg types

maplestation_modules/code/modules/mob/living/carbon/human/species_types/animid/animid.dm

@@ -108,6 +108,7 @@ GLOBAL_LIST_INIT_TYPED(animid_singletons, /datum/animid_type, init_animid_single
 	. = ..()
 	for(var/animalid_id in GLOB.animid_singletons)
 		. |= GLOB.animid_singletons[animalid_id].get_feature_keys()
+	. += /datum/preference/color/mutant_color::savefile_key
 
 // Filters out features from other animid types, to declutter the prefs screen
 /datum/species/human/animid/filter_features_per_prefs(list/to_filter, datum/preferences/prefs)
@@ -118,6 +119,9 @@ GLOBAL_LIST_INIT_TYPED(animid_singletons, /datum/animid_type, init_animid_single
 	// re-add features that we may have filtered from our selected animid type
 	to_filter |= GLOB.animid_singletons[selected_animid_id].get_feature_keys()
 
+	if(prefs.read_preference(/datum/preference/toggle/enable_mutant_colors))
+		to_filter -= /datum/preference/choiced/skin_tone::savefile_key
+
 // Shows all organs from all animid types
 /datum/species/human/animid/get_mut_organs(include_brain = TRUE)
 	. = ..()

maplestation_modules/code/modules/mob/living/carbon/human/species_types/animid/animid_prefs.dm

@@ -40,6 +40,35 @@
 		)
 	return data
 
+/datum/preference/toggle/enable_mutant_colors
+	savefile_key = "enable_mutant_colors"
+	savefile_identifier = PREFERENCE_CHARACTER
+	priority = PREFERENCE_PRIORITY_BODYPARTS
+	category = PREFERENCE_CATEGORY_SECONDARY_FEATURES
+	can_randomize = FALSE
+	default_value = FALSE
+
+/datum/preference/toggle/enable_mutant_colors/is_accessible(datum/preferences/preferences)
+	return ..() && ispath(preferences.read_preference(/datum/preference/choiced/species), /datum/species/human/animid)
+
+/datum/preference/toggle/enable_mutant_colors/apply_to_human(mob/living/carbon/human/target, value)
+	if(!isanimid(target))
+		return
+	if(value)
+		REMOVE_TRAIT(target, TRAIT_USES_SKINTONES, SPECIES_TRAIT)
+		ADD_TRAIT(target, TRAIT_MUTANT_COLORS, SPECIES_TRAIT)
+		for(var/obj/item/bodypart/limb in target.get_bodyparts())
+			if(limb.limb_id == SPECIES_HUMAN)
+				limb.limb_id = BODYPART_ID_MUTANT
+		target.update_body_parts()
+	else
+		REMOVE_TRAIT(target, TRAIT_MUTANT_COLORS, SPECIES_TRAIT)
+		ADD_TRAIT(target, TRAIT_USES_SKINTONES, SPECIES_TRAIT)
+		for(var/obj/item/bodypart/limb in target.get_bodyparts())
+			if(limb.limb_id == BODYPART_ID_MUTANT)
+				limb.limb_id = SPECIES_HUMAN
+		target.update_body_parts()
+
 /proc/generate_tail_icon(datum/sprite_accessory/tail_accessory, feature_key, tail_color = COLOR_BROWNER_BROWN)
 	var/datum/universal_icon/body = generate_body_icon(
 		bodyparts = list(

tgui/packages/tgui/interfaces/PreferencesMenu/preferences/features/_modular_species_features.tsx

@@ -270,3 +270,8 @@ export const feature_android_laws: FeatureChoiced = {
   `,
   component: AndroidLaws,
 };
+
+export const enable_mutant_colors: FeatureToggle = {
+  name: 'Enable Mutant Colors',
+  component: CheckboxInput,
+};