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Sturdy Waft Ruby

#cb2421
Notes

Sturdy Waft Ruby (#CB2421) is a true red with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (1°, 72%, 46%) places it in the balanced band at a mid lightness. It works across type, buttons, and borders, saturated enough to feel deliberate but balanced enough to not fight the rest of the palette. For a confident two-color system, pair it with its complementary cyan. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#cb2421
RGB
rgb(203, 36, 33)
HSL
hsl(1, 72%, 46%)
HWB
hwb(1 13% 20%)
OKLCH
oklch(54.4% 0.202 27.8)
HSV
hsv(1, 84%, 80%)
LAB
lab(44.34% 62.57 44.92)
LCH
lch(44.34% 77.02 35.68)
CMYK
cmyk(0%, 82%, 84%, 20%)

Etymology

Sturdy
adjective

Old French estourdi, stunned, reckless — drifted in English to mean robust, well-built. Used as a color modifier since the seventeenth century for hues that read as durable and unfussy — the working browns of saddle leather, the working greens of pasture wool. Sits in the bold-and-warm corner alongside robust and solid.

Waft
modifier

Middle English waft, related to wafian, to-wave-in-air. As a color modifier, waft implies a gently-conveyed-and-air-borne-and-drifting quality, the visual register of incense-and-rose-petal-waft hand-gently-conveyed-and-air-borne-and-drifting incense-and-rose-petal-and-summer-curtain wafted-and-gently-conveyed-and-air-borne surfaces under incense-and-rose-petal-and-summer-curtain church-thurible-and-walled-rose-garden-and-open-window airborne-drift-light. Sits at the modifier-and-mood end of the grid, parallel to drift and mist in usage.

Ruby
noun

From the Latin ruber — simply, red. The gemstone is a chromium-tinged corundum, harder than anything in nature except diamond, and so saturated that a fine Burmese pigeon's blood ruby at auction outpaces a comparable diamond by weight. The color borrows the gem's confidence: a clear, glassy red without the brown of garnet or the blue of crimson.

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.

#cb2421
Original
#5c521e
Protanopia
#847617
Deuteranopia
#e00026
Tritanopia
#474747
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).
AAon White
5.51:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AA Largeon Black
3.81:1

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