Cool Mustard Opal

#4b5918

Notes

Cool Mustard Opal (#4B5918) is a deep yellow with a warm character. It leans warm, pulling light toward red, orange, and yellow. Naturally inviting, it suits editorial and hospitality contexts. Its HSL profile (73°, 58%, 22%) 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 indigo. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX

#4b5918

RGB

rgb(75, 89, 24)

HSL

hsl(73, 58%, 22%)