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X11 named colors

Seagreen4

seagreen4 · #2E8B57

HEX

#2E8B57

RGB

rgb(46, 139, 87)

CMYK

cmyk(67%, 0%, 37%, 45%)

HSL

hsl(146, 50%, 36%)

LAB

lab(51.5, -39.7, 20.1)

What is Seagreen4?

Seagreen4 is the seagreen4 reference in the X11 named colors. Its sRGB value is #2E8B57 (rgb 46, 139, 87). It sits in the green family. Historical X Window System color names — the numbered 1-4 lightness variants of the classic xorg-server rgb.txt palette. See disclaimer for accuracy and trademark notes.

Accessibility

WCAG 2.1 contrast checks for Seagreen4 as a background.

Black text on this color

Sample text · 4.95 : 1
AA Normal
AA Large
AAA Normal
AAA Large

White text on this color

Sample text · 4.25 : 1
AA Normal
AA Large
AAA Normal
AAA Large

Shades, tints & tonal scale of Seagreen4

An 11-step tonal scale derived from Seagreen4 (#2E8B57). Click any swatch to copy its HEX. Use these as a starting point for design tokens, hover states, and disabled states in a design system.

Copied #EEF6F2

50

#EEF6F2

#EEF6F2

Copied #DEECE4

100

#DEECE4

#DEECE4

Copied #BCDAC9

200

#BCDAC9

#BCDAC9

Copied #97C5AB

300

#97C5AB

#97C5AB

Copied #62A881

400

#62A881

#62A881

Copied #2E8B57

500

#2E8B57

#2E8B57

Copied #27764A

600

#27764A

#27764A

Copied #1E5A39

700

#1E5A39

#1E5A39

Copied #153F27

800

#153F27

#153F27

Copied #0C2316

900

#0C2316

#0C2316

Copied #06110A

950

#06110A

#06110A

Lighter tints (mixed with white)

Copied #74A484

15%

#74A484

Copied #99B8A3

30%

#99B8A3

Copied #B6CABC

45%

#B6CABC

Copied #CDDAD1

60%

#CDDAD1

Copied #E2E9E4

75%

#E2E9E4

Darker shades (mixed with black)

Copied #2A8150

15%

#2A8150

Copied #267649

30%

#267649

Copied #216941

45%

#216941

Copied #1B5A37

60%

#1B5A37

Copied #14482B

75%

#14482B

Color harmonies for Seagreen4

Classic color-theory harmonies derived from rotating the hue of Seagreen4. Use these to build accent palettes, brand systems, and accessible UI color pairings.

Complementary

180° opposite — strongest contrast

Copied #2E8B57

#2E8B57

#2E8B57

Copied #8A2E62

#8A2E62

#8A2E62

Triadic

Three colors 120° apart

Copied #2E8B57

#2E8B57

#2E8B57

Copied #562E8A

#562E8A

#562E8A

Copied #8A562E

#8A562E

#8A562E

Analogous

Two neighbors ±30° on the wheel

Copied #348A2E

#348A2E

#348A2E

Copied #2E8B57

#2E8B57

#2E8B57

Copied #2E8A84

#2E8A84

#2E8A84

Split-complementary

Base + two colors flanking its complement

Copied #2E8B57

#2E8B57

#2E8B57

Copied #842E8A

#842E8A

#842E8A

Copied #8A2E34

#8A2E34

#8A2E34

Tetradic

Two complementary pairs

Copied #2E8B57

#2E8B57

#2E8B57

Copied #2E628A

#2E628A

#2E628A

Copied #8A2E62

#8A2E62

#8A2E62

Copied #8A562E

#8A562E

#8A562E

Square

Four colors evenly spaced 90° apart

Copied #2E8B57

#2E8B57

#2E8B57

Copied #2E348A

#2E348A

#2E348A

Copied #8A2E62

#8A2E62

#8A2E62

Copied #8A842E

#8A842E

#8A842E

Seagreen4 in every color space

Full conversion of Seagreen4 across the color spaces designers and developers actually use — including OKLCH (the perceptually-uniform space that powers Tailwind v4 and CSS Color Module Level 4) and HWB.

HEX

#2E8B57

RGB

rgb(46, 139, 87)

CMYK

cmyk(67%, 0%, 37%, 45%)

HSL

hsl(146, 50%, 36%)

HSV

hsv(146, 67%, 55%)

HWB

hwb(146 18% 45%)

CIE Lab

lab(51.5 -39.7 20.1)

OKLCH

oklch(56.9% 0.119 154.9)

XYZ (D65)

xyz(12.08, 19.73, 12.19)

Copy-ready code for Seagreen4

Drop-in snippets for CSS, Tailwind, Sass, iOS Swift, and Android XML. Click the copy button on any snippet to put it on your clipboard.

CSS

color: #2E8B57;
background-color: #2E8B57;

CSS variable

:root {
  --color-seagreen4: #2E8B57;
}

Tailwind config

// tailwind.config.js
colors: {
  'seagreen4': '#2E8B57',
}

Sass

$color-seagreen4: #2E8B57;

Swift UIColor

UIColor(red: 0.180, green: 0.545, blue: 0.341, alpha: 1.0)

Android XML

<color name="seagreen4">#2E8B57</color>

Closest match in every color system

The nearest Seagreen4 equivalent in every other color system on this site, ranked by ΔE2000 perceptual distance. Useful when translating between design-system, web-standard, and industrial color references.

Closest in X11 named colors

Top 6 ΔE2000-closest entries within the same collection.

Top 6 ΔE2000-closest Pantone references. Cross-system matching is approximate — see disclaimer.

Top 6 ΔE2000-closest RAL Classic references for industrial coating cross-reference.

Copied #308446

RAL 6024

#308446

Traffic green

Copied #4C9141

RAL 6017

#4C9141

May green

Copied #287233

RAL 6001

#287233

Emerald green

Copied #587246

RAL 6011

#587246

Reseda green

Copied #35682D

RAL 6010

#35682D

Grass green

Copied #57A639

RAL 6018

#57A639

Yellow green

FAQ about Seagreen4

What is the HEX code for Seagreen4?

Seagreen4 (seagreen4) has the HEX code #2E8B57. In RGB it is rgb(46, 139, 87), and in CMYK it is cmyk(67%, 0%, 37%, 45%).

What is the OKLCH value of Seagreen4?

Seagreen4 converts to oklch(0.569 0.119 154.9). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.

Is Seagreen4 accessible for body text?

Used as a background, Seagreen4 has a contrast ratio of 4.95:1 with black text and 4.25:1 with white text. WCAG 2.1 AA requires 4.5:1 for normal text. The current recommendation is to use black text and verify in real UI context.

What is the closest Pantone to Seagreen4?

The closest Pantone reference to Seagreen4 by ΔE2000 perceptual distance is Pantone 348 C (#00843D). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.

What is the closest RAL color to Seagreen4?

The closest RAL Classic reference to Seagreen4 by ΔE2000 distance is RAL 6024 (Traffic green, #308446). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.

What is the complementary color of Seagreen4?

The complementary color (180° opposite on the HSL color wheel) of Seagreen4 is #8A2E62. Use it for high-contrast accents, error states, or call-to-action pairings.

Data provenance & source

X11 named colors (xorg rgb.txt)

The historical X11 color name list shipped in the xorg-server rgb.txt file. Roughly 550 entries covering classic computing color names like 'PapayaWhip', 'MediumAquamarine', and 'DarkSlateGray'. Many CSS named colors originate here. Use as a reference for legacy and creative color names. Most modern CSS implementations accept these names directly.

Source type
derived
Confidence
high
License
MIT/X11 license (X Consortium)
Last reviewed
2026-05-24

Workflow tags

x11
named-color
legacy
green

X11 colors are sRGB digital values from a 1980s color system. For print, convert to a process-appropriate color and proof against substrate.

X11 named colors · Seagreen4 — #2E8B57 | PantoneTools