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Fluorescent Stamen

#cdeb54
Notes

Fluorescent Stamen (#CDEB54) is a true yellow with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (72°, 79%, 63%) 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 indigo. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#cdeb54
RGB
rgb(205, 235, 84)
HSL
hsl(72, 79%, 63%)
HWB
hwb(72 33% 8%)
OKLCH
oklch(89.0% 0.176 119.7)
P3
color(display-p3 0.8264 0.9180 0.4253)
HSV
hsv(72, 64%, 92%)
LAB
lab(88.46% -29.90 67.36)
LCH
lch(88.46% 73.70 113.94)
CMYK
cmyk(13%, 0%, 64%, 8%)

Etymology

Fluorescent
adjective

Latin fluēre, to flow — adjectival suffix -escent. As a color modifier, fluorescent implies a saturated-and-UV-stimulated-glow quality, the bright color of fluorite-and-ZnS mineral-pigment fluorescent-lamp emission. Sits at the bright-and-cool end of the grid, parallel to phosphorescent and neon in usage.

Stamen
noun

The pollen-bearing male reproductive part of a flower — the Crocus sativus stamen yields saffron, the Lilium stamen leaves orange smudges on white linen, and the Hibiscus stamen sticks out from open blooms. The color refers to a Crocus stamen with anther: a saturated, slightly cool deep yellow with the matte finish of pollen-rich anther.

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.

#cdeb54
Original
#f9de40
Protanopia
#f6de5f
Deuteranopia
#d8dfcc
Tritanopia
#dadada
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
1.35:1
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
15.61:1

Wide gamut

Display P3 representation

The CSS Color 4 wide-gamut form of this color. Both swatches render the same color on every display — the P3 form only diverges from sRGB when a designer pushes channels outside sRGB's reach.

sRGB hex
sRGB hex
##CDEB54
Display P3
Display P3
color(display-p3 0.8264 0.9180 0.4253)
P3 has subtle headroomOKLCH chroma 0.176

Moderately saturated colors gain a small bump in P3 — the difference is usually visible side-by-side on wide-gamut hardware but won't change the character of the color.

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