Ishihara Quickie Test

Look for numbers within these circles:

Plate 2 normal - 8 colorblind - 3	Plate 15 normal - 7 colorblind - nothing
Plate 24 trichromat - 35 deuteranope - 3 protanope - 5	Plate 21 deuteranope - 73 other - nothing, 7 or 3

Hans Irtel's Deuteranopic Confusion Colors
and How Color Vision Testing Works