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Robust Jupiter Forest

#1e8817
Notes

Robust Jupiter Forest (#1E8817) 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 (116°, 71%, 31%) places it in the balanced band at a dark lightness. It works well as a headline, icon, or deep background in an otherwise light layout, pairing cleanly with cream, bone, and warm neutrals. 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
#1e8817
RGB
rgb(30, 136, 23)
HSL
hsl(116, 71%, 31%)
HWB
hwb(116 9% 47%)
OKLCH
oklch(54.8% 0.172 142.2)
P3
color(display-p3 0.2586 0.5256 0.1750)
HSV
hsv(116, 83%, 53%)
LAB
lab(49.43% -50.03 47.60)
LCH
lch(49.43% 69.06 136.43)
CMYK
cmyk(78%, 0%, 83%, 47%)

Etymology

Robust
adjective

From the Latin robustus, of oak — implying strength combined with substance. As a color modifier, robust describes saturation combined with body: a robust burgundy, a robust olive. Sits in the bold-and-warm corner alongside strong and solid, with the slightly textural implication of a color that has substance behind the pigment.

Jupiter
modifier

Latin Iuppiter, Roman-king-of-gods-and-fifth-planet. As a color modifier, jupiter implies a Roman-king-of-gods-and-fifth-planet-and-gas-giant quality, the visual register of Roman-Jupiter-Optimus-Maximus-and-Galileo-moons hand-Roman-king-of-gods-and-fifth-planet-and-gas-giant Roman-Jupiter-Optimus-Maximus-and-Galileo-moons-and-Great-Red-Spot jupiter-and-Roman-king-of-gods surfaces under Roman-Jupiter-Optimus-Maximus-and-Galileo-moons-and-Great-Red-Spot Capitoline-Hill-and-Galilean-moon-discovery king-of-planets-light. Sits at the modifier-and-zodiac end of the grid, parallel to venus and saturn 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.

#1e8817
Original
#8b7a00
Protanopia
#807225
Deuteranopia
#008473
Tritanopia
#696969
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).
AAon White
4.58:1
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
4.59:1

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
##1E8817
Display P3
Display P3
color(display-p3 0.2586 0.5256 0.1750)
P3 has subtle headroomOKLCH chroma 0.172

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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