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Glowing Custard

#b1db64
Notes

Glowing Custard (#B1DB64) is a true lime 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 (81°, 62%, 63%) 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 indigo. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#b1db64
RGB
rgb(177, 219, 100)
HSL
hsl(81, 62%, 63%)
HWB
hwb(81 39% 14%)
OKLCH
oklch(83.7% 0.154 125.8)
HSV
hsv(81, 54%, 86%)
LAB
lab(82.34% -31.99 53.26)
LCH
lch(82.34% 62.13 120.99)
CMYK
cmyk(19%, 0%, 54%, 14%)

Etymology

Glowing
adjective

The progressive participle of glow, to emit light — used as a color word since the medieval period for hues that read as if they were luminous from within. Glowing amber, glowing rose: the implication is moderate saturation combined with the optical impression of internal light. Sits in the bright-bucket alongside radiant.

Custard
noun

A cooked mixture of egg yolks and milk or cream — the foundational sauce of European pastry from medieval times forward. The color refers to a chilled vanilla custard or crème anglaise: a soft, slightly off-white yellow with the satiny surface of cooked egg protein. Lighter than yolk (the eggs are diluted), warmer than cream, with the kitchen-canon familiarity of an everyday culinary color.

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.

#b1db64
Original
#e5ce58
Protanopia
#e0cc6c
Deuteranopia
#b7d2c1
Tritanopia
#c9c9c9
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
1.59:1
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
13.19:1

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