orthoclase is white, red or pink, and gray.
"Geology"
James Geikie
It often occurs as a constituent of granite, not unfrequently being associated in the same rock with pink felspar or orthoclase.
"Geology"
James Geikie
Ordinary granite, as well as syenite and eurite, usually contains two kinds of feldspar: First, the common, or orthoclase, in which potash is the prevailing alkali, and this generally occurs in large crystals of a white or flesh colour; and secondly, feldspar in smaller crystals, in which soda predominates, usually of a dead white or spotted, and striated like albite, but not the same in composition.
"The Student's Elements of Geology"
Sir Charles Lyell