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Spirited Buttercup

#aab54b
Notes

Spirited Buttercup (#AAB54B) is a true yellow with an earthy character. It leans grounded and natural, the kind of color that plays well with wood, clay, linen, and warm neutrals. Its HSL profile (66°, 42%, 50%) 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 blue. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#aab54b
RGB
rgb(170, 181, 75)
HSL
hsl(66, 42%, 50%)
HWB
hwb(66 29% 29%)
OKLCH
oklch(74.3% 0.131 114.6)
HSV
hsv(66, 59%, 71%)
LAB
lab(70.94% -18.52 51.49)
LCH
lch(70.94% 54.72 109.78)
CMYK
cmyk(6%, 0%, 59%, 29%)

Etymology

Spirited
adjective

An adjectival form of spirit — used as a color modifier since the seventeenth century for hues that read as animate and characterful. Spirited orange, spirited green: the implication is saturation combined with personality, a color that feels like it has agency. Sits at the bright-bucket center alongside lively and vibrant.

Buttercup
noun

Ranunculus acris and its meadow cousins — the small, glossy yellow flowers of European pastures whose petals reflect ultraviolet light to attract bees. The color refers to a buttercup petal in full sun: a saturated, slightly cool yellow with the polished finish of an epidermis that scatters light like wet paint. The folk test for whether you like butter — holding the flower under your chin to catch its yellow reflection — works on every variety.

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.

#aab54b
Original
#c1ad3f
Protanopia
#c0af51
Deuteranopia
#b4ab9e
Tritanopia
#ababab
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
2.23:1
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
9.42:1

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