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Tarry Roselle

#870b1c
Notes

Tarry Roselle (#870B1C) is a deep red 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 (352°, 85%, 29%) 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 teal. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#870b1c
RGB
rgb(135, 11, 28)
HSL
hsl(352, 85%, 29%)
HWB
hwb(352 4% 47%)
OKLCH
oklch(39.9% 0.154 22.7)
HSV
hsv(352, 92%, 53%)
LAB
lab(28.05% 48.68 26.84)
LCH
lch(28.05% 55.59 28.87)
CMYK
cmyk(0%, 92%, 79%, 47%)

Etymology

Tarry
adjective

Old English teru, tar — adjectival suffix -y. As a color modifier, tarry implies the deep-glossy-black quality of bitumen-and-petroleum-tar viscous-residue surfaces, particularly the La-Brea-and-Trinidad-Pitch-Lake natural-asphalt seeps. Sits at the deep-and-warm end of the grid, parallel to pitchy and bituminous in usage.

Roselle
noun

Hibiscus sabdariffa, the tropical hibiscus whose dried calyxes brew the deep red sorrel tea sold across West Africa as bissap, in Egypt as karkadeh, and in the Caribbean as sorrel. The color refers to fresh roselle calyxes in hot water: a saturated, slightly cool deep red-pink with the optical complexity of anthocyanin-rich plant material. Cooler than coral.

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.

#870b1c
Original
#37321b
Protanopia
#544b17
Deuteranopia
#950014
Tritanopia
#272727
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
10.02:1
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
2.09:1

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