Rich Mustard Crystal

#1b1f05

Notes

Rich Mustard Crystal (#1B1F05) is a deep yellow with a jewel character. It carries the deep, saturated richness of a gemstone. Authoritative and slightly formal, it works well for type and heavy UI elements. Its HSL profile (69°, 72%, 7%) places it in the balanced band at a dark lightness. It works well as a headline, icon, or deep background in an otherwise light layout, pairing cleanly with cream, bone, and warm neutrals. For a confident two-color system, pair it with its complementary blue. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX

#1b1f05

RGB

rgb(27, 31, 5)

HSL

hsl(69, 72%, 7%)