Wiktionary
unblack
a. (context uncommon English) Not black.
Usage examples of "unblack".
I was neither a grown-up nor a child, while my face was unwashed, my hair unbrushed, my clothes tumbled, and my boots unblacked and muddy.
He stamped one foot, and picked up his other laced boot, heavy, thick-soled, unblacked, mended many times.
Her wonder had then come to be how he could marry Louise, when they sat together on the seaward piazza, and he poured out his easy talk, unwearied and unwearying, while, with one long, lank leg crossed upon the other, he swung his unblacked, thin-soled boot to and fro.