The Compendium of Caraka 5.3.6_3

5.3.6_3

athāsya keśalomānyāyacchet,tasya cet keśalomānyāyamyamānāni pralucyeran na cedvedayeyustaṃ parāsuriti vidyāt/ tasya cedudare sirāḥ prakāśerañ śyāvatāmranīlahāridraśuklā vā syuḥ, parāsuriti vidyāt/

Then one should pull his head-hair and body-hair; if, when pulled, his head-hair and body-hair pluck out without him feeling it, one should know him to have lost his life-breath. If veins become visible on his abdomen, and are dark grey, copper, blue, turmeric-colored, or white, one should know him to have lost his life-breath.