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Buzzing Geel

#acb50b
Notes

Buzzing Geel (#ACB50B) is a true yellow 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 (63°, 89%, 38%) places it in the highly saturated band at a mid 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 blue. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#acb50b
RGB
rgb(172, 181, 11)
HSL
hsl(63, 89%, 38%)
HWB
hwb(63 4% 29%)
OKLCH
oklch(74.1% 0.164 113.3)
HSV
hsv(63, 94%, 71%)
LAB
lab(70.76% -20.44 70.93)
LCH
lch(70.76% 73.82 106.08)
CMYK
cmyk(5%, 0%, 94%, 29%)

Etymology

Buzzing
adjective

The progressive participle of buzz — borrowed metaphorically as a color word since the late twentieth century for hues that read as visually loud and slightly destabilizing. Buzzing yellow, buzzing magenta: the implication is saturation pushed past comfortable into the realm of optical agitation. Sits at the bright-bucket extreme alongside electric.

Geel
noun

The Dutch word for yellow — used in the painted facades of Amsterdam canal houses, the Vermeer-painted lemon yellow of Dutch genre painting, and the bright yellow tulip cultivars of Dutch flower auctions. The color refers to geel-painted seventeenth-century Dutch shutters: a saturated, slightly cool yellow with the matte finish of lead-and-oil paint.

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.

#acb50b
Original
#c3ac00
Protanopia
#c3af25
Deuteranopia
#b8a99a
Tritanopia
#a7a7a7
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
2.24:1
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
9.37:1

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