Anyone have a suggestion for a common* natural dye that makes a cool fawn or grey?

I've tried a lot of things that look like they do in image searches, but on my wool they all turn out warm beige to tan to russet. I can't find anything that comes out cool toned on wool.

Suggestions?

Thx

#DyeGarden #dyeing #FibreArts

*preferably something that can be found in the garden or the bush.

The dye garden is finally beginning to look good, with yellow dyer's chamomile (cota tinctoria) the first to flower alongside dyer's woodruff (asperula tinctoria) with its white cloud of frothy flowers.

Most dye plants seem to have yellow flowers! So we also grow some blue flowered plants for bees as a nice contrast. Here you can see Viper's bugloss (echium vulgare) which is an outstanding dye plant. It is biennial and we let is self seed wherever it wants to grow.
#DyeGarden