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Imperial Cygnus Forest

#0a8621
Notes

Imperial Cygnus Forest (#0A8621) 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 (131°, 86%, 28%) 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
#0a8621
RGB
rgb(10, 134, 33)
HSL
hsl(131, 86%, 28%)
HWB
hwb(131 4% 47%)
OKLCH
oklch(54.0% 0.169 144.5)
HSV
hsv(131, 93%, 53%)
LAB
lab(48.54% -50.94 43.21)
LCH
lch(48.54% 66.79 139.69)
CMYK
cmyk(93%, 0%, 75%, 47%)

Etymology

Imperial
adjective

From the Latin imperialis, of the empire — applied to color since the medieval period for the hues reserved for sovereigns and empires: imperial purple of Tyrian dye, imperial yellow of Ming-dynasty porcelain. As a modifier, imperial implies saturation combined with the institutional weight of a color owned by a court. Sits in the bold-and-deep corner, alongside royal.

Cygnus
modifier

Latin cygnus, swan. As a color modifier, cygnus implies a swan-flying-and-Northern-Cross quality, the visual register of Cygnus-Swan-and-Northern-Cross hand-swan-flying-and-Northern-Cross Cygnus-Swan-and-Northern-Cross-and-Bortle-1-sky cygnus-and-swan-flying-and-Northern-Cross surfaces under Cygnus-Swan-and-Northern-Cross-and-Bortle-1-sky August-and-September-late-summer-zenith Milky-Way-stellar-light. Sits at the modifier-and-cosmic end of the grid, parallel to deneb and lyra 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.

#0a8621
Original
#89780e
Protanopia
#7c702c
Deuteranopia
#008272
Tritanopia
#646464
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
4.72:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AA Largeon Black
4.44:1

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