Jewelbluedeep
HSL
227° · 79% · 34%
Deep Cobalt Gleam
#12309b
Notes
Deep Cobalt Gleam (#12309B) is a deep 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 (227°, 79%, 34%) places it in the highly saturated band at a dark lightness. Best used in small doses, like logos, CTAs, focus rings, or highlight text, where its saturation becomes a feature rather than noise. 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
#12309b
RGB
rgb(18, 48, 155)
HSL
hsl(227, 79%, 34%)
Tints & Shades
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Complementary
Split Complementary