What is "adjective color"

Adjective \Ad"jec*tive\ ([a^]d"j[e^]k*t[i^]v), a. [See Adjective, n.]

1. Added to a substantive as an attribute; of the nature of an adjunct; as, an adjective word or sentence.

2. Not standing by itself; dependent.

   Adjective color, a color which requires to be fixed by some mordant or base to give it permanency.

3. Relating to procedure. ``The whole English law, substantive and adjective.''
   --Macaulay.