dye 
(dī)
(dī)n.
1. A substance used to color materials. Also called dyestuff.
2. A color imparted by dyeing.
v. dyed, dye·ing, dyes
v.tr.
To color (a material), especially by soaking in a coloring solution.
v.intr.
Idiom: To take on or impart color.
of the deepest dye
Of the most extreme sort.
[Middle English deie, from Old English dēag, dēah.]
dyer n.