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Rural Czarny

#21001b
Notes

Rural Czarny (#21001B) is a deep magenta 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 (311°, 100%, 6%) 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 green. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#21001b
RGB
rgb(33, 0, 27)
HSL
hsl(311, 100%, 6%)
HWB
hwb(311 0% 87%)
OKLCH
oklch(16.9% 0.075 336.2)
HSV
hsv(311, 100%, 13%)
LAB
lab(3.64% 18.12 -9.00)
LCH
lch(3.64% 20.23 333.60)
CMYK
cmyk(0%, 100%, 18%, 87%)

Etymology

Rural
adjective

Latin rūrālis, of-the-countryside — adjectival suffix -al. As a color modifier, rural implies a neutral-and-country-and-traditional quality, the neutral color of American-and-English-Country rural-and-traditional farmhouse-and-cottage interior-decoration-and-textile surface-finish. Sits at the neutral-and-traditional end of the grid, parallel to country and pastoral in usage.

Czarny
noun

Polish for black — derived from the Slavic root čьrnъ, sharing root with Russian chyornyy. Czarny color refers to a Polish-Catholic priest's czarny funerary cassock: a saturated, slightly cool deep black with the matte finish of multi-bath iron-and-tannin-mordant dye on woven Polish wool. The Slavic color tradition distinguishes czarny smolisty (pitch-black) from czarny granatowy (very dark navy).

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.

#21001b
Original
#00091c
Protanopia
#0a0f1a
Deuteranopia
#23010b
Tritanopia
#090909
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
19.44:1
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
1.08:1

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