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Hooded Dawn

#0a398d
Notes

Hooded Dawn (#0A398D) is a deep azure 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 (218°, 87%, 30%) 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
#0a398d
RGB
rgb(10, 57, 141)
HSL
hsl(218, 87%, 30%)
HWB
hwb(218 4% 45%)
OKLCH
oklch(37.3% 0.148 261.3)
P3
color(display-p3 0.0983 0.2199 0.5327)
HSV
hsv(218, 93%, 55%)
LAB
lab(26.49% 20.23 -50.52)
LCH
lch(26.49% 54.42 291.82)
CMYK
cmyk(93%, 60%, 0%, 45%)

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.

Dawn
noun

The transitional sky color in the half-hour before sunrise — when the sun is below the horizon but its light scatters off the upper atmosphere. The color refers to the eastern sky at civil twilight on a clear summer morning: a soft, slightly violet-shifted blue with a very slight orange wash near the horizon. Cooler than dawn-itself's pink moments, warmer than midnight, with the daily weight of a moment that lasts only minutes.

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

Click any swatch to explore

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.

#0a398d
Original
#004590
Protanopia
#00398b
Deuteranopia
#004e5d
Tritanopia
#353535
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
10.59:1
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
1.98:1

Wide gamut

Display P3 representation

The CSS Color 4 wide-gamut form of this color. Both swatches render the same color on every display — the P3 form only diverges from sRGB when a designer pushes channels outside sRGB's reach.

sRGB hex
sRGB hex
##0A398D
Display P3
Display P3
color(display-p3 0.0983 0.2199 0.5327)
P3 has subtle headroomOKLCH chroma 0.148

Moderately saturated colors gain a small bump in P3 — the difference is usually visible side-by-side on wide-gamut hardware but won't change the character of the color.

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