Mehron’s Color Cups are the perfect little pots of richly-pigmented greasepaint for your clown face. They are the same greasepaint as in the big tubs and the pencils, so they are formulated to blend well with one another.
White is the same famous Mehron Clown White original formula.
Red is a bright cherry red for nose, lips, pips, and cheeks.
Blue is a vibrant color perfect for outlines. Blend with White for a highlight on the eyelids.
Black is a true black for outlines.
Monster Grey is the nicest color we've found for Tramp or Hobo clown stubble or "5 o'clock shadow". Not as harsh-looking as the black greasepaint. Apply with a Stipple Sponge. 
For easy and smooth application, warm clown makeup in the palm of the hand before dabbing onto the skin.  Apply with fingertips using a “patting” technique to eliminate streaking.
After applying, dust your face liberally with Colorset Powder to set the grease (makes it dry), and brush off excess.
To wash off, first reliquify with Makeup Remover, wipe off grease, then wash with soap and warm water.