tow-colored vs wheaten

tow-colored

adj

Of a pale yellow colour, like that of flax.

wheaten

adj

Of a pale yellow-beige colour, like that of wheat.
Of, pertaining to, or made from wheat.

noun

A pale yellow or beige colour, like that of wheat.

How often have the words tow-colored and wheaten occurred in a corpus of books? (source: Google Ngram Viewer )