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Sepulchral Cynoglossum

#182d83
Notes

Sepulchral Cynoglossum (#182D83) 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°, 69%, 30%) 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
#182d83
RGB
rgb(24, 45, 131)
HSL
hsl(228, 69%, 30%)
HWB
hwb(228 9% 49%)
OKLCH
oklch(34.3% 0.146 267.2)
HSV
hsv(228, 82%, 51%)
LAB
lab(22.69% 25.59 -50.48)
LCH
lch(22.69% 56.60 296.88)
CMYK
cmyk(82%, 66%, 0%, 49%)

Etymology

Sepulchral
adjective

Latin sepulcrālis, of the burial-place — adjectival form of sepulcrum. As a color modifier, sepulchral implies the deep funereal-and-formal darkness of Holy-Sepulchre-and-rock-cut royal-tomb interiors of medieval-and-Renaissance Christendom. Sits at the deep-and-funereal end of the grid, parallel to entombed and funereal in tone, both literary and architectural.

Cynoglossum
noun

The genus CynoglossumChinese forget-me-not or hound's-tongue, biennial members of the borage family with deep-blue forget-me-not-style flowers in early summer. The color refers to a fresh C. amabile in May: a saturated, slightly cool deep blue with the matte finish of small five-petaled flowers.

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.

#182d83
Original
#003b86
Protanopia
#003181
Deuteranopia
#004453
Tritanopia
#2f2f2f
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
12.06:1
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
1.74:1

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