That must be “SDMB invisible OP”.
Dried Blood Brown.
Semen White.
Pus Yellow.
Cooter Pink
**Irridescent Jamocha Ripple Brown
Erotic Crimson
Empire Waist Summer Dress Lavender
Ochre Blaze
Persimmon
Rainbow Jamocha Ripple
Oak Tag Beige
Kasha Varnishkes Dappled Brown
Rump Roast Rouge
Gold Lame
Persimmon
Wild Wysteria Lavender
Pajama Purple
Instant Message Blush
Chalk Dust White
Salt and Pepper Sparkles
Bugs On The Windshield Brown
Grass Stain Green
Daring Toenail Glitter Royal Blue**
Is it terrible that I know exactly what colour that is? Great list. I have nothing to add, because I suck.
Screen of Death Blue
Hey, I’ve seen that one! :rolleyes: :mad:
Beatdown Bruise Purple
Dried Birdcrap Ivory
Scab Maroon
Tabasco Red
Baby Poo Yellow
Chunky Vomit Fleck-Carrot-Orange
SuSE Linux green
Macintosh translucent pastels (collect the set!)
PC clone beige
City snow speckle
Broccoli green
Potato ivory
Kung pao red
Chernobyl yellow fluorescent
And these are the colours Mom never gave you:
Meaty dogpoo red
Weathered dogpoo brown
Antique dogpoo grey
Sirloin swirl (brown and translucent ivory)
Phlegm yellow
Old Piss Yellow
Steak Fat White
Moldy Green
Clogged Toilet Mess Brown
Blowjob Mystery Color (usually a peach crayon with pink or red markings around the outside) can also be green.
I gotta go with Calvin and Hobbes here. A complete set of crayons should include barf color 
Ballistic Trauma Swirl Crimson, with Cherry Red and “Cerebellum Tope” mixed in.
Gas Explosion Orange
Scorched Titanium
Zombie Green-Gray
Acid Trip Indigo (Catch the reference)
Invisible Pink
California Smog
Thermal-Optic Blend
Jackboot Leather
Etherial Being translucent "Flesh"
Polka Dots
Ranchoth
Lightly Grilled Umber
Incandescent Puce
Ultraviolet
Blue-brown
Octarine
Screen of Death Blue
Antique Monochrome Amber
Mosquito Bite Red
Hammered Fingernail
Inept Phlebotomist Purple
Bile Green
Calf scours yellow. For those of you who don’t speak farmer go to…
http://www.google.com/url?sa=U&start=2&q=http://www.ianr.unl.edu/pubs/animaldisease/g269.htm&e=42
Actually some of the colours mentioned here are available from Citadel (for miniature painting)
Scab Red
Bubonic Brown
Vomit Brown
Vermin Brown
Leprous Brown
Nauseating Blue
Snot Green
Rotting Flesh
Vile Green
look here for a list http://www.newwavegames.com/gw/citadel/index.html