color.
To char is to burn or blacken something so that it's like charcoal but still tasty. A char is something that has been burned in this way. To char is to burn something on the outside.
CMYKH (c, m, y, k): (0, 0, 0, 50)
SRGBB (r, g, b): (128, 128, 128)
HSV (h, s, v): (0°, 0%, 50.2%)