In case you were ever wondering: according to Webster’s, lyart is an old Scottish term for grayish haired, variegated. Merriam-Webster is even more forthcoming:
Main Entry: ly·art
Pronunciation: ˈlī-ərt
Function: adjective
Etymology: Middle English, from Anglo-French liart
Date: 14th century
chiefly Scottish : streaked with gray : gray
There you have it. No art involved at all.

