No painting ghosts!

Holograms can be coloured, though

code/game/machinery/hologram.dm

@@ -114,6 +114,7 @@ For the other part of the code, check silicon say.dm. Particularly robot talk.*/
 	hologram.anchored = 1//So space wind cannot drag it.
 	hologram.name = "[A.name] (Hologram)"//If someone decides to right click.
 	hologram.SetLuminosity(2)	//hologram lighting
+	hologram.color = color //painted holopad gives coloured holograms
 	SetLuminosity(2)			//pad lighting
 	icon_state = "holopad1"
 	A.holo = src

code/modules/reagents/Chemistry-Reagents.dm

@@ -1592,13 +1592,13 @@ datum
 
 			reaction_obj(var/obj/O, var/volume)
 				..()
-				if(istype(O,/obj) && !istype(O,/obj/item/weapon/reagent_containers))
-					//painting glasses would just be a headache
+				if(istype(O,/obj))
 					O.color = color
 
 			reaction_mob(var/mob/M, var/method=TOUCH, var/volume)
 				..()
-				if(istype(M,/mob))
+				if(istype(M,/mob) && !istype(M,/mob/dead))
+					//painting ghosts: not allowed
 					M.color = color