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Fortified Cord Emerald

#137a1a
Notes

Fortified Cord Emerald (#137A1A) 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 (124°, 73%, 28%) 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
#137a1a
RGB
rgb(19, 122, 26)
HSL
hsl(124, 73%, 28%)
HWB
hwb(124 7% 52%)
OKLCH
oklch(50.6% 0.158 143.4)
P3
color(display-p3 0.2207 0.4712 0.1665)
HSV
hsv(124, 84%, 48%)
LAB
lab(44.42% -46.80 41.73)
LCH
lch(44.42% 62.70 138.28)
CMYK
cmyk(84%, 0%, 79%, 52%)

Etymology

Fortified
adjective

Latin fortificāre, to make strong — past-participle of fortify. As a color modifier, fortified implies a saturated-and-strengthened-and-defensive quality, the deep-rich color of Vauban-style military-fortification stone-and-earth rampart-and-bastion architecture. Sits at the bold-and-fortified end of the grid, parallel to bastioned and armored.

Cord
modifier

Old French corde, string / rope. As a color modifier, cord implies a twisted-string-and-rope quality, the visual register of hand-twisted-and-corded twine-and-rope-and-cord hand-twisted-and-laid-rope hand-tied-cord-and-rope surfaces under hand-twisted-and-corded rope-and-cord working light. Sits at the modifier-and-texture end of the grid, parallel to twine and knot in usage.

Emerald
noun

A chromium-tinged variety of beryl — the gemstone mined from the Cleopatra-era Mons Smaragdus in Egypt, the Muzo deposits of Colombia, and the Sandawana mines of Zimbabwe. Emerald green refers to a high-clarity faceted emerald with strong color saturation: a saturated, slightly blue-shifted green with the gem's signature internal life. Cooler than fern, warmer than teal, with the heraldic weight of two thousand years of royal favor.

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.

#137a1a
Original
#7d6e05
Protanopia
#726625
Deuteranopia
#007668
Tritanopia
#5d5d5d
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
5.49:1
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
3.83:1

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
##137A1A
Display P3
Display P3
color(display-p3 0.2207 0.4712 0.1665)
P3 has subtle headroomOKLCH chroma 0.158

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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