Picked up the Liquid RIT dye https://www.ritstudio.com/techniques...ials/feathers/
today and did 4 colors - Dark Green, Purple, Sunshine Orange and Aquamarine. The stuff is really easy to use 1/4th cup of the dye to a quart of hot 140 degree water, dump the feathers in and stir them, drain the dye off and use warm water to rinse then dry. The Aquamarine and Sunshine Orange came out just as I thought they would. The Dark Green and Purple I may re-do tommorrow, they didn't come out as dark as I wanted and I left them in a long time.
Sunshine Orange
Aquamarine
Dark Green
Purple