Backgrounds With Asterisk(*), can have colors changed.

943 Radioactive
959 Danger*
962 Radioactive*
38 Toxic*
948 Slime*
929 Wicked
931 Skull*
261 Nightmare
241 Spooky
915 Spooky
916 Spooky
918 Spooky
923 Spooky
927 Spooky