I color for a long time with Simplicol colors Colour Espresso results on linen and cotton, a mixture of mud brown with very light purplish. I use mostly just 1/3 to half of the color (the result is me otherwise too dark), nevertheless the result falls very nice, at 1/3 I get the color taupe. Also nice for batiks, the lighter parts are then slightly bluish.
Conclusion: My absolute favorite color!
Amazon Prime delivery to is still free, as low you get the colors (if any) in a little business. Especially not in Eb **, where the colors are now available for almost 8 EUR excl. Shipping.