darkening charcoal reeds

So I was thinking of darkening my charcoal reeds a bit as they’re too light for my liking, I wanted a slight dark blue out of them, any suggestions for dye or advice?

Add some green to them, use Emerald green, cause Tex Green is a blueish green depending on the lighting

Emerald green Rit Dye right?

Yes, there are threads where Englundisgod has explained how he dyes his coveralls to get the right colours