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Regal Yomogi

#4ea500
Notes

Regal Yomogi (#4EA500) is a deep lime 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 (92°, 100%, 32%) places it in the highly saturated band at a dark 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
#4ea500
RGB
rgb(78, 165, 0)
HSL
hsl(92, 100%, 32%)
HWB
hwb(92 0% 35%)
OKLCH
oklch(64.2% 0.192 136.3)
HSV
hsv(92, 100%, 65%)
LAB
lab(60.36% -49.69 61.84)
LCH
lch(60.36% 79.33 128.78)
CMYK
cmyk(53%, 0%, 100%, 35%)

Etymology

Regal
adjective

Latin rēgālis, kingly — derived from rēx (king). As a color modifier, regal implies a saturated-and-royal-formality quality, the deep-rich color of British-Coronation-period royal vestment-and-mantle and Imperial-State-Crown regalia. Sits at the bold-and-imperial end of the grid, parallel to sovereign and royal in usage.

Yomogi
noun

Artemisia indica, Japanese mugwort — used in yomogi-mochi (mugwort rice cakes) and as a traditional moxibustion herb. Yomogi-iro refers to the slightly muted yellow-green of fresh mugwort leaves: a soft, slightly muted yellow-green with the matte finish of pubescent leaf surface. Drier than wakaba.

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.

#4ea500
Original
#ab9600
Protanopia
#a08f21
Deuteranopia
#499e8c
Tritanopia
#878787
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
3.13:1
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
6.71:1

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