Shiva Purana
रक्तं कृष्णं च रक्तं च षट्कमेव प्रकीर्तितम् ॥ दक्षिणाद्यं महेशानि पूर्वावधि समीरितम् ॥ ३२ ॥
The six colors are described as red, black and red. O great lords from the south it is spread out to the east.
english translation
raktaM kRSNaM ca raktaM ca SaTkameva prakIrtitam ॥ dakSiNAdyaM mahezAni pUrvAvadhi samIritam ॥ 32 ॥
hk transliteration by Sanscript