color.
Generally, alloys are used as a base metal for plated or filled jewelry, and that is the case with black gold. Gold gets mixed with a darker metal, like cobalt, which creates black gold. When alloys are used to create black gold, there is a
standard ratio: 1 part metal to 3 parts gold.
CMYKH (c, m, y, k): (0, 0, 0, 87)
SRGBB (r, g, b): (32, 32, 32)
HSV (h, s, v): (0°, 0%, 12.5%)