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Aflame Watercress

#51ae31
Notes

Aflame Watercress (#51AE31) is a true green with a cool character. It leans cool, sitting on the blue, green, and violet side of the wheel. Quiet and dependable, a fit for product UI and data visualization. Its HSL profile (105°, 56%, 44%) 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 violet. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#51ae31
RGB
rgb(81, 174, 49)
HSL
hsl(105, 56%, 44%)
HWB
hwb(105 19% 32%)
OKLCH
oklch(66.9% 0.183 139.0)
HSV
hsv(105, 72%, 68%)
LAB
lab(63.54% -50.08 52.95)
LCH
lch(63.54% 72.88 133.40)
CMYK
cmyk(53%, 0%, 72%, 32%)

Etymology

Aflame
adjective

Old English on-flamme, on-fire. As a color modifier, aflame implies a saturated-and-burning-bright quality, the bright color of autumn-Maple-and-Oak peak-color deciduous-foliage and Bonfire-Night large-flame fire emission. Sits at the bright-and-warm end of the grid, parallel to flaming and blazing in usage.

Watercress
noun

Nasturtium officinale, the European aquatic mustard-family green eaten in soups, salads, and sandwiches — particularly in the celebrated cresson de fontaine of French bouquet garni. Watercress color refers to fresh-picked watercress in cool stream water: a saturated, slightly cool deep yellow-green with the satin finish of aquatic-leaf surface. Cooler than arugula.

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.

#51ae31
Original
#b39f1c
Protanopia
#a7973d
Deuteranopia
#48a895
Tritanopia
#919191
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).
Failon White
2.82:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAAon Black
7.45:1

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