Cool Rust Opal

#664a38

Notes

Cool Rust Opal (#664A38) is a deep orange with an earthy character. It leans grounded and natural, the kind of color that plays well with wood, clay, linen, and warm neutrals. Its HSL profile (23°, 29%, 31%) places it in the muted 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 azure. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX

#664a38

RGB

rgb(102, 74, 56)

HSL

hsl(23, 29%, 31%)