GRAIN n. 2 definitions
A reddish dye made from the coccus insect, or kermes; hence, a red color of any tint or hue, as crimson, scarlet, etc.; sometimes used by the poets as equivalent to Tyrian purple. All in a robe of darkest grain. Milton. Doing as the dyers do, who, having first dipped their silks in colors of less value, then give' them…