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Sinewy Matcha

#289f00
Notes

Sinewy Matcha (#289F00) 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 (105°, 100%, 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 violet. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#289f00
RGB
rgb(40, 159, 0)
HSL
hsl(105, 100%, 31%)
HWB
hwb(105 0% 38%)
OKLCH
oklch(61.4% 0.200 140.7)
HSV
hsv(105, 100%, 62%)
LAB
lab(57.31% -56.61 58.97)
LCH
lch(57.31% 81.74 133.83)
CMYK
cmyk(75%, 0%, 100%, 38%)

Etymology

Sinewy
adjective

Old English sinu, sinew — adjectival suffix -y. As a color modifier, sinewy implies a saturated-and-muscular-and-firm quality where the hue carries the lean-and-strong visual presence of a Roman-statue athletic figure. Sits at the bold-and-firm end of the grid, parallel to stalwart and rugged in usage.

Matcha
noun

The shade-grown, stone-ground green tea of the Japanese tea ceremony — leaves of Camellia sinensis covered for weeks before harvest to concentrate chlorophyll, then powdered in a granite mill. The color refers to ceremonial-grade matcha whisked in hot water: a saturated, slightly muted green with the powdery finish of micron-scale leaf particles. Brighter than sage, deeper than lime, with the meditative weight of a 600-year-old practice.

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.

#289f00
Original
#a38f00
Protanopia
#968620
Deuteranopia
#009a86
Tritanopia
#7a7a7a
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
3.47:1
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
6.05:1

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