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Fizzy Cucumber

#51b555
Notes

Fizzy Cucumber (#51B555) 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 (122°, 40%, 51%) 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
#51b555
RGB
rgb(81, 181, 85)
HSL
hsl(122, 40%, 51%)
HWB
hwb(122 32% 29%)
OKLCH
oklch(69.1% 0.164 144.3)
HSV
hsv(122, 55%, 71%)
LAB
lab(66.10% -48.96 39.89)
LCH
lch(66.10% 63.15 140.83)
CMYK
cmyk(55%, 0%, 53%, 29%)

Etymology

Fizzy
adjective

Imitative-onomatopoeic origin — adjectival suffix -y, evoking the sound of carbonation. As a color modifier, fizzy implies a saturated-and-effervescent-and-bubbly quality, the bright color of Champagne-and-Prosecco effervescent-wine carbonation-bubble-light reflection. Sits at the bright-and-effervescent end of the grid, parallel to bubbly and sparkling in usage.

Cucumber
noun

Cucumis sativus, the climbing cucurbit domesticated in northern India and now grown across every continent. The color refers to the skin of a fresh field cucumber: a saturated, slightly muted green with the polished surface of unwaxed fruit, deeper at the rind and lighter at the seedy core. Brighter than pickle, cooler than pear, with the high water content that makes the word a synonym for cool composure.

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.

#51b555
Original
#b8a64c
Protanopia
#ab9d5c
Deuteranopia
#40b19f
Tritanopia
#999999
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
2.60:1
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
8.09:1

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