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Tough Juniper

#21a039
Notes

Tough Juniper (#21A039) 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 (131°, 66%, 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 magenta. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#21a039
RGB
rgb(33, 160, 57)
HSL
hsl(131, 66%, 38%)
HWB
hwb(131 13% 37%)
OKLCH
oklch(61.8% 0.178 145.6)
P3
color(display-p3 0.3034 0.6183 0.2783)
HSV
hsv(131, 79%, 63%)
LAB
lab(57.81% -54.48 43.11)
LCH
lch(57.81% 69.48 141.64)
CMYK
cmyk(79%, 0%, 64%, 37%)

Etymology

Tough
adjective

Old English tōh, firm / tenacious — sharing root with German zäh. As a color modifier, tough implies a saturated-and-resilient quality where the hue resists fading-and-modulation through its strong pigmentation. Sits at the bold-and-resilient end of the grid, parallel to rugged and hardy in usage.

Juniper
noun

The genus Juniperus, evergreen shrubs and trees whose fleshy berries — actually fleshy cones — flavor gin and Scandinavian sauerkraut. The color refers to the foliage of a mature juniper: a deep, slightly muted green with the matte finish of scale leaves and resinous waxes. Drabber than spruce, warmer than fir, with the alpine association of a plant that can grow at higher elevation than almost any other tree.

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.

#21a039
Original
#a3912d
Protanopia
#958742
Deuteranopia
#009c8a
Tritanopia
#7e7e7e
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
3.41:1
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
6.15:1

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
##21A039
Display P3
Display P3
color(display-p3 0.3034 0.6183 0.2783)
P3 has subtle headroomOKLCH chroma 0.178

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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