// monochrome( color )
// returns monochromatic variations of given color

ks-monochrome( color )
    baseLightness = lightness( color )
    first = adjust( color, "lightness", baseLightness * 0.666666666666666 )
    second = adjust( color, "lightness", baseLightness * 0.333333333333333 )
    ( first second )

monochrome = ks-monochrome unless ks-no-conflict