The list below falls short of definitive, but it's one of the longest, which has got to count for something. Warning to my wife: I'm in a clear blue mood tonight.
Black -- sexual intercourseBlue -- blow job (alternate meaning: lap dance)
Green -- cunnilingus (alternate meaning: outdoor sex, hug)
Clear -- whatever you want (alternate meaning: hug)
Orange -- kiss
Yellow -- hug
Red -- lap dance
Purple -- anal sex
Silver -- fisting
White -- flash your tits
Pink -- flashing
Gold glitter -- make out
Brown -- toss my salad, i.e., analingus
Glow in the dark -- using sex toys
glittery yellow -- hugging & kissing
glittery green -- 69
glittery purple -- French
glittery orange -- kiss
Indigo -- Hand-job with blowjob
Clear Gold with glitter -- fingering
Clear blue -- All of everything
Clear Pink -- Its the girls choice
Clear Green -- All Anal
Glow in the dark pink -- female sex toys
Glow in the dark blue -- boy sex toys
Glow in the dark green -- Sex with porn
light blue -- masturbate
gold -- suck on any part of body
gray (silver) -- flash