The Compendium of Caraka 6.4.11

6.4.11

sāndraṃ sapāṇḍu sasnehaṃ picchilaṃ ca kaphānvitam/
śyāvāruṇaṃ saphenaṃ ca tanu rūkṣaṃ ca vātikam//

Dense, pale, unctuous, and slimy when accompanied by kapha;
greyish-red, frothy, thin, and dry when caused by vāta;