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Frenetic Lorikeet

#51b553
Notes

Frenetic Lorikeet (#51B553) 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 (121°, 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
#51b553
RGB
rgb(81, 181, 83)
HSL
hsl(121, 40%, 51%)
HWB
hwb(121 32% 29%)
OKLCH
oklch(69.1% 0.166 143.9)
HSV
hsv(121, 55%, 71%)
LAB
lab(66.07% -49.22 40.83)
LCH
lch(66.07% 63.96 140.32)
CMYK
cmyk(55%, 0%, 54%, 29%)

Etymology

Frenetic
adjective

Greek phrenitikós, frenzied — adjectival suffix -ic, derived from phrēn (mind). As a color modifier, frenetic implies a saturated-and-frenzied-and-active quality, the bright color of Hyper-Color-and-Memphis-Group 1980s-design saturated-and-active visual-rhythm. Sits at the bright-and-active end of the grid, parallel to frantic and manic in usage.

Lorikeet
noun

The subfamily Loriinae — Australasian rainbow lorikeets and their relatives, brush-tongued nectar-feeding parrots with vivid multicolored plumage. Lorikeet color refers to the green wing covers of Trichoglossus moluccanus: a saturated, slightly cool deep green with the satin finish of structural-pigment feather 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.

#51b553
Original
#b8a64a
Protanopia
#ab9d5a
Deuteranopia
#41b09f
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
8.08:1

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