Shiva Purana
तदधो धवलं श्यामं पीतं रक्तं चतुष्टयम् ॥ अधस्त्रिकोणके रक्तं शुक्लं पीतं वरानने ॥ २९॥
Below that are four white, black, yellow and red. Red, white and yellow in the lower triangle, O beautiful one.
english translation
tadadho dhavalaM zyAmaM pItaM raktaM catuSTayam ॥ adhastrikoNake raktaM zuklaM pItaM varAnane ॥ 29॥
hk transliteration by Sanscript