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Knightly Groen

#42a51f
Notes

Knightly Groen (#42A51F) is a true green 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 (104°, 68%, 38%) 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
#42a51f
RGB
rgb(66, 165, 31)
HSL
hsl(104, 68%, 38%)
HWB
hwb(104 12% 35%)
OKLCH
oklch(63.8% 0.189 139.3)
HSV
hsv(104, 81%, 65%)
LAB
lab(60.04% -51.97 55.45)
LCH
lch(60.04% 76.00 133.14)
CMYK
cmyk(60%, 0%, 81%, 35%)

Etymology

Knightly
adjective

Old English cniht, young man / knight — adjectival suffix -ly. As a color modifier, knightly implies a saturated-and-chivalrous-and-medieval quality, the deep-rich color of medieval-English-and-French knight-and-squire armorial-bearings-and-livery tradition. Sits at the bold-and-chivalrous end of the grid, parallel to gallant and cavalier.

Groen
noun

The Dutch word for green — used for the Hollands Groen of Delft Blue's complementary glaze and the green polders of Dutch reclaimed-land farmland. The color refers to a Delft-pottery green underglaze: a saturated, slightly cool green with the matte finish of fired tin-glaze. The Dutch cousin of green.

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.

#42a51f
Original
#aa9600
Protanopia
#9e8e2f
Deuteranopia
#369f8d
Tritanopia
#868686
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).
AA Largeon White
3.17:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAon Black
6.63:1

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