Shiva Purana
शुक्ले धर्मं विजानीयात्कृष्णे पापं विनिर्दिशेत्॥ रक्ते बंधं विजानीयात्पीते विद्विषमादिशेत्॥ ९॥
If the shadow is white, know that it is an indication of virtue; if it is black, it indicates sin; if it is red, it indicates bondage and if it is yellow it indicates an enemy.
english translation
zukle dharmaM vijAnIyAtkRSNe pApaM vinirdizet॥ rakte baMdhaM vijAnIyAtpIte vidviSamAdizet॥ 9॥
hk transliteration by Sanscript