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Hooded Cobalto

#1a318a
Notes

Hooded Cobalto (#1A318A) 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 (228°, 68%, 32%) 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 amber. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#1a318a
RGB
rgb(26, 49, 138)
HSL
hsl(228, 68%, 32%)
HWB
hwb(228 10% 46%)
OKLCH
oklch(35.9% 0.150 267.0)
HSV
hsv(228, 81%, 54%)
LAB
lab(24.48% 25.80 -51.91)
LCH
lch(24.48% 57.97 296.43)
CMYK
cmyk(81%, 64%, 0%, 46%)

Etymology

Hooded
adjective

Old English hōd, hood — past-participle of hood, sharing root with German Hut (hat). As a color modifier, hooded implies the deep-and-veiled-and-fabric-shrouded quality of monk-and-friar enveloping-cowled-cloak silhouette in Cistercian-and-Benedictine monastic tradition. Sits at the deep-and-veiled end of the grid, parallel to cloaked and mantled with monastic register.

Cobalto
noun

The Italian word for cobalt — used for the saturated deep blue of cobalto-glaze on Tuscan and Venetian Renaissance ceramics. The color refers to a cobalto-glazed Tuscan piatto: a saturated, slightly cool deep blue with the high gloss of cobalt-glazed porcelain. The Italian cousin of cobalt.

Closest matches

The nearest named color in three reference sources, ranked by perceptual distance (ΔE76 in CIELAB). ΔE < 1 is imperceptible to most viewers; ΔE > 10 is clearly different. When two sources point to the same hex they’re merged into one tile; click any to open that color’s page.

Variations

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Harmonies

Accessibility

Color-vision simulation

How this color appears to viewers with the four major color-vision-deficiency types. Computed via the Machado (2009) physiologically-based model. If a tile matches the original, the color reads the same to that viewer.

#1a318a
Original
#00408d
Protanopia
#003588
Deuteranopia
#004858
Tritanopia
#333333
Achromatopsia
WCAG contrast

The color used as foreground text against pure white and pure black, with the contrast ratio and WCAG 2.1 grade. Aim for AA (4.5:1) for body text and AA Large (3:1) for 18 pt+ headlines; AAA (7:1) is the gold standard for long-form reading surfaces.

The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAAon White
11.35:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
Failon Black
1.85:1

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