大毘盧遮那成佛經疏 2.75

2.75

第四十六「云何顯色心？謂類彼為性」者，譬如青黃赤白等染色，若素絲入之便與同色。此人心亦如是，見聞善法亦隨彼行，見聞惡事亦依隨修學，乃至無記亦爾，對種種境界隨事而遷。行人自覺知已，當念專求自證之法，不由他悟、不為他緣所轉，是彼對治。

The forty-sixth: "What is the color mind? It is having conformity to others as its nature." For example, regarding dyes of blue, yellow, red, white, and the like: if raw silk is put into them, it takes on the same color. This person's mind is also like this: seeing and hearing wholesome teachings, it follows along with their practice; seeing and hearing unwholesome deeds, it also practices and learns in accordance with them; even with neutral deeds it is likewise—shifting according to whatever circumstances it confronts. When the practitioner realizes this in themselves, reflecting on exclusively seeking the Dharma of self-realization, not being awakened by others and not being swayed by external conditions, serves as its antidote.