Assertion: color | /r/HasProperty | achieved at low luminance levels
Facets:
value: except for yellows
type: OTHER
value: very
type: DEGREE
Source sentences:
text: The MacAdam limit, on which the most saturated (or "optimal") colors reside, shows that colors that are near monochromatic colors can only be achieved at very low luminance levels, except for yellows, because a mixture of the wavelengths from the long straight-line portion of the spectral locus between green and red will combine to make a color very close to a monochromatic yellow.