Thomas "Tom" Luth (February 19, 1954 - May 23, 2024) was the main colorist for Usagi Yojimbo. He colored the Mirage run of Usagi as well as all the covers (except for the few Stan colored himself, such as painted covers). Tom was also the colorist for much of the IDW run of Usagi.
He was also the colorist for Groo The Wander.