Plush Cobalt Marble

#1b3b9d

Notes

Plush Cobalt Marble (#1B3B9D) is a true blue 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 (225°, 71%, 36%) places it in the balanced band at a mid lightness. It works across type, buttons, and borders, saturated enough to feel deliberate but balanced enough to not fight the rest of the palette. For a confident two-color system, pair it with its complementary amber. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX

#1b3b9d

RGB

rgb(27, 59, 157)

HSL

hsl(225, 71%, 36%)