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Effective Mojito

#637b1b
Notes

Effective Mojito (#637B1B) is a deep lime 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 (75°, 64%, 29%) 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 indigo. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#637b1b
RGB
rgb(99, 123, 27)
HSL
hsl(75, 64%, 29%)
HWB
hwb(75 11% 52%)
OKLCH
oklch(54.5% 0.122 123.0)
P3
color(display-p3 0.4069 0.4796 0.1772)
HSV
hsv(75, 78%, 48%)
LAB
lab(48.13% -22.66 46.12)
LCH
lch(48.13% 51.38 116.16)
CMYK
cmyk(20%, 0%, 78%, 52%)

Etymology

Effective
adjective

Latin effectīvus, productive — adjectival suffix -ive. As a color modifier, effective implies a clear-and-purpose-achieving quality where the hue carries the visual register of successful-task-completion design-element. Sits at the crisp-and-functional end of the grid, parallel to practical and useful in usage.

Mojito
noun

The Cuban cocktail of rum, lime, mint, sugar, and soda — popularized by Hemingway in Old Man and the Sea settings. Mojito color refers to a fresh-shaken mojito with crushed mint: a soft, slightly cool yellow-green with the optical clarity of muddled-herb-and-spirits.

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.

#637b1b
Original
#837305
Protanopia
#7f7224
Deuteranopia
#687469
Tritanopia
#6f6f6f
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
4.80:1
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
4.38:1

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
##637B1B
Display P3
Display P3
color(display-p3 0.4069 0.4796 0.1772)
P3 has subtle headroomOKLCH chroma 0.122

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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