posted 10 minutes ago
The purple and green and grayish green are Western Jackolantern, Omphalatos olivascens. The yellow is a variety of rustgills, Gymnopilus species. The rusty orange is old man's beard lichen, Usnea species. No mordants, most mushrooms don't need them.
Our puffballs are white and I don't imagine they give much color. However I have used the Dyer's Puffball or Dead Man's Foot, Pisolithus tinctorius, which isn't an actual puffball, to make a dark chocolate brown.
Colorwork is in some ways easier than socks, though socks are more portable.