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Lionhearted Mirth Forest

#128b27
Notes

Lionhearted Mirth Forest (#128B27) is a deep 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 (130°, 77%, 31%) 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 magenta. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#128b27
RGB
rgb(18, 139, 39)
HSL
hsl(130, 77%, 31%)
HWB
hwb(130 7% 45%)
OKLCH
oklch(55.5% 0.169 144.7)
P3
color(display-p3 0.2498 0.5369 0.2129)
HSV
hsv(130, 87%, 55%)
LAB
lab(50.38% -51.29 42.75)
LCH
lch(50.38% 66.77 140.19)
CMYK
cmyk(87%, 0%, 72%, 45%)

Etymology

Lionhearted
adjective

Old English lēona-heorte, lion's-heart — referring to Richard I Lionheart (1157–1199). As a color modifier, lionhearted implies a saturated-and-courageous-and-royal quality, the deep-rich color of Crusader-period English Plantagenet-royalty armorial bearings. Sits at the bold-and-chivalrous end of the grid, parallel to valiant and heroic.

Mirth
modifier

Old English myrgth, joy-or-pleasure. As a color modifier, mirth implies a hearty-and-laughing-and-festive quality, the visual register of Twelfth-Night-and-Mardi-Gras-mirth hand-hearty-and-laughing-and-festive Twelfth-Night-and-Mardi-Gras-and-Saturnalia mirthed-and-hearty-and-laughing-and-festive surfaces under Twelfth-Night-and-Mardi-Gras-and-Saturnalia banquet-hall-and-festival-square candlelit-revelry-light. Sits at the modifier-and-mood end of the grid, parallel to glee and merry in usage.

Forest
noun

The dense canopy of a temperate or tropical woodland — oak, beech, pine, eucalyptus, mahogany — wherever leaves close above to filter the light below. Forest green refers to the average reflectance of a healthy mid-summer canopy seen from below: a saturated, slightly muted green with the matte finish of layered chlorophyll. Deeper than fern, cooler than olive, with the ecological weight of a word that has named every wooded biome on Earth.

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.

#128b27
Original
#8e7d18
Protanopia
#817531
Deuteranopia
#008777
Tritanopia
#6a6a6a
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
4.42:1
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
4.75:1

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
##128B27
Display P3
Display P3
color(display-p3 0.2498 0.5369 0.2129)
P3 has subtle headroomOKLCH chroma 0.169

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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