大乘百法明門論疏 1.38

1.38

解云：「此亦得緣青黃實色，陰夜遠望青、黃、赤、白，雖非分明了了至觸而見，然亦得緣，是故唯緣青等實色，不緣於假。」

The commentary states: "In this case as well, one is able to cognize the real forms of blue and yellow. Gazing from afar on a dark night, although blue, yellow, red, and white are not clearly and distinctly seen up close, yet one is still able to cognize them. Therefore, it only cognizes real forms such as blue, and does not cognize the nominal."