Hello

On Page Seventy-Six, Sayadaw moves on to the other color kasinas as follows;
brown, blue and black using head hairs, yellow on fat or urine, red on blood and grossly on.  When these are developed, then one can use the meditation on flowers or other external objects. He says poetically, All yellow flowers are calling out, inviting  you to develop the yellow kasina. 

He states that in the Pali texts, the Buddha taught ten kasinas, the four colors and the six of earth, water, fire, wind, space and light.

I am glad to be moving on from the colors of the body found in the most disgusting and scary parts.