some fixes

code/game/atoms.dm

@@ -463,8 +463,10 @@
 	if(!new_blood_dna)
 		return FALSE
 	LAZYINITLIST(blood_DNA)	//if our list of DNA doesn't exist yet, initialise it.
+	LAZYINITLIST(blood_DNA["color"])
 	var/old_length = blood_DNA.len
 	blood_DNA |= new_blood_dna
+	blood_DNA["color"] += new_blood_dna["bloodcolor"]
 	if(blood_DNA.len == old_length)
 		return FALSE
 	return TRUE
@@ -472,8 +474,11 @@
 //to add blood dna info to the object's blood_DNA list
 /atom/proc/transfer_blood_dna(list/blood_dna, list/datum/disease/diseases)
 	LAZYINITLIST(blood_DNA)
+	LAZYINITLIST(blood_dna["color"])
+
 	var/old_length = blood_DNA.len
 	blood_DNA |= blood_dna
+	blood_DNA["color"] += blood_dna["bloodcolor"]
 	if(blood_DNA.len > old_length)
 		return TRUE
 		//some new blood DNA was added

code/modules/mob/living/carbon/human/species_types/jellypeople.dm

@@ -42,6 +42,10 @@
 		slime_change.Grant(C)	//CIT CHANGE
 	C.faction |= "slime"
 
+/datum/species/jelly/handle_mutant_bodyparts(mob/living/carbon/human/H)
+	//update blood color to body color
+	H.dna.species.exotic_blood_color = "#" + H.dna.features["mcolor"]
+
 /datum/species/jelly/spec_life(mob/living/carbon/human/H)
 	if(H.stat == DEAD || HAS_TRAIT(H, TRAIT_NOMARROW)) //can't farm slime jelly from a dead slime/jelly person indefinitely, and no regeneration for blooduskers
 		return

code/modules/mob/living/carbon/update_icons.dm

@@ -193,9 +193,6 @@
 
 /mob/living/carbon/update_body()
 	update_body_parts()
-	// snowflakey thing: update blood colour if a slimeperson
-	if(isjellyperson(src))
-		dna.species.exotic_blood_color = "#" + dna.features["mcolor"]
 
 /mob/living/carbon/proc/update_body_parts()
 	//CHECK FOR UPDATE

code/modules/reagents/chemistry/reagents/other_reagents.dm

@@ -70,6 +70,8 @@
 		B = new(T)
 	if(data["blood_DNA"])
 		B.blood_DNA[data["blood_DNA"]] = data["blood_type"]
+		if(!B.blood_DNA["color"])
+			B.blood_DNA["color"] = list(data["bloodcolor"])
 	if(B.reagents)
 		B.reagents.add_reagent(type, reac_volume)
 	B.update_icon()