Surya Siddhanta
अर्धाद् ऊने सधूम्रम् स्यात् कृष्णम् अर्धाधिकम् भवेत् । विमुञ्चतः कृष्णताम्रम् कपिलम् सकलग्रहे॥
The pjvt obscured, when less than half, will be dusky (sadhumra) ; when more than half, it will be black ; when emerging, it is dark copper-color (krshrtntamra) ; when the obscuration is total, it is tawny (hapila). [The commentary adds the important circumstance, omitted in the text, that the moon alone is here spoken of; no specification being added with reference to the sun, because, in a solar eclipse, the part obscured is always black. A more suitable place might have been found for this verse in the fourth chapter, as it has nothing to do with the projection of an eclipse.]
english translation
ardhAd Une sadhUmram syAt kRSNam ardhAdhikam bhavet । vimuJcataH kRSNatAmram kapilam sakalagrahe॥
hk transliteration by Sanscript