Rasarnava 6.128

6.128

dehasiddhikaraḥ kṛṣṇaḥ pīte pītaḥ site sitaḥ
sarvārthasiddhido raktaḥ tathā marakataprabhaḥ
śeṣe dve niṣphale varjye vaikrāntamiti saptadhā //

the black brings perfection of the body; the yellow is [used] for yellow [metals], the white for white; / the red yields all desired success, as does the one with the luster of emerald; / the remaining two are fruitless and to be avoided: thus vaikrānta is of seven kinds.