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protanopia (red/green color blindness; no red cones) deutanopia (red/green color blindness; no green cones) tritanopia (blue/yellow color blindness; no blue cones) grayscale/achromatopsia (quick check for all forms of colorblindness) atypical achromatopsia (low cone function; cone monochromat) protanomaly (anomalous red cones) deutanomaly (anomalous green cones) tritanomaly (anomalous blue cones) coverage test in black (highlight filter limitations) coverage test in white (highlight filter limitations) coverage test in gray (highlight filter limitations) :The way