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X11 named colors

Seagreen1

seagreen1 · #54FF9F

HEX

#54FF9F

RGB

rgb(84, 255, 159)

CMYK

cmyk(67%, 0%, 38%, 0%)

HSL

hsl(146, 100%, 66%)

LAB

lab(89.8, -64.5, 33.4)

What is Seagreen1?

Seagreen1 is the seagreen1 reference in the X11 named colors. Its sRGB value is #54FF9F (rgb 84, 255, 159). 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 Seagreen1 as a background.

Black text on this color

Sample text · 16.18 : 1
AA Normal
AA Large
AAA Normal
AAA Large

White text on this color

Sample text · 1.30 : 1
AA Normal
AA Large
AAA Normal
AAA Large

Shades, tints & tonal scale of Seagreen1

An 11-step tonal scale derived from Seagreen1 (#54FF9F). 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 #F1FFF7

50

#F1FFF7

#F1FFF7

Copied #E4FFF0

100

#E4FFF0

#E4FFF0

Copied #C8FFE0

200

#C8FFE0

#C8FFE0

Copied #AAFFCF

300

#AAFFCF

#AAFFCF

Copied #7FFFB7

400

#7FFFB7

#7FFFB7

Copied #54FF9F

500

#54FF9F

#54FF9F

Copied #47D987

600

#47D987

#47D987

Copied #37A667

700

#37A667

#37A667

Copied #267348

800

#267348

#267348

Copied #154028

900

#154028

#154028

Copied #0A1F13

950

#0A1F13

#0A1F13

Lighter tints (mixed with white)

Copied #83FFB2

15%

#83FFB2

Copied #A2FFC3

30%

#A2FFC3

Copied #BBFFD1

45%

#BBFFD1

Copied #D1FFDF

60%

#D1FFDF

Copied #E4FFEC

75%

#E4FFEC

Darker shades (mixed with black)

Copied #4EED94

15%

#4EED94

Copied #46DA87

30%

#46DA87

Copied #3EC479

45%

#3EC479

Copied #35AA68

60%

#35AA68

Copied #298953

75%

#298953

Color harmonies for Seagreen1

Classic color-theory harmonies derived from rotating the hue of Seagreen1. Use these to build accent palettes, brand systems, and accessible UI color pairings.

Complementary

180° opposite — strongest contrast

Copied #54FF9F

#54FF9F

#54FF9F

Copied #FF52B4

#FF52B4

#FF52B4

Triadic

Three colors 120° apart

Copied #54FF9F

#54FF9F

#54FF9F

Copied #9D52FF

#9D52FF

#9D52FF

Copied #FF9D52

#FF9D52

#FF9D52

Analogous

Two neighbors ±30° on the wheel

Copied #5DFF52

#5DFF52

#5DFF52

Copied #54FF9F

#54FF9F

#54FF9F

Copied #52FFF3

#52FFF3

#52FFF3

Split-complementary

Base + two colors flanking its complement

Copied #54FF9F

#54FF9F

#54FF9F

Copied #F352FF

#F352FF

#F352FF

Copied #FF525D

#FF525D

#FF525D

Tetradic

Two complementary pairs

Copied #54FF9F

#54FF9F

#54FF9F

Copied #52B4FF

#52B4FF

#52B4FF

Copied #FF52B4

#FF52B4

#FF52B4

Copied #FF9D52

#FF9D52

#FF9D52

Square

Four colors evenly spaced 90° apart

Copied #54FF9F

#54FF9F

#54FF9F

Copied #525DFF

#525DFF

#525DFF

Copied #FF52B4

#FF52B4

#FF52B4

Copied #FFF352

#FFF352

#FFF352

Seagreen1 in every color space

Full conversion of Seagreen1 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

#54FF9F

RGB

rgb(84, 255, 159)

CMYK

cmyk(67%, 0%, 38%, 0%)

HSL

hsl(146, 100%, 66%)

HSV

hsv(146, 67%, 100%)

HWB

hwb(146 33% 0%)

CIE Lab

lab(89.8 -64.5 33.4)

OKLCH

oklch(89.0% 0.193 154.4)

XYZ (D65)

xyz(45.67, 75.90, 45.04)

Copy-ready code for Seagreen1

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: #54FF9F;
background-color: #54FF9F;

CSS variable

:root {
  --color-seagreen1: #54FF9F;
}

Tailwind config

// tailwind.config.js
colors: {
  'seagreen1': '#54FF9F',
}

Sass

$color-seagreen1: #54FF9F;

Swift UIColor

UIColor(red: 0.329, green: 1.000, blue: 0.624, alpha: 1.0)

Android XML

<color name="seagreen1">#54FF9F</color>

Closest match in every color system

The nearest Seagreen1 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 #BDECB6

RAL 6019

#BDECB6

Pastel green

Copied #89AC76

RAL 6021

#89AC76

Pale green

Copied #57A639

RAL 6018

#57A639

Yellow green

Copied #E7EBDA

RAL 9002

#E7EBDA

Grey white

Copied #84C3BE

RAL 6027

#84C3BE

Light green

Copied #BEBD7F

RAL 1000

#BEBD7F

Green beige

FAQ about Seagreen1

What is the HEX code for Seagreen1?

Seagreen1 (seagreen1) has the HEX code #54FF9F. In RGB it is rgb(84, 255, 159), and in CMYK it is cmyk(67%, 0%, 38%, 0%).

What is the OKLCH value of Seagreen1?

Seagreen1 converts to oklch(0.890 0.193 154.4). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.

Is Seagreen1 accessible for body text?

Used as a background, Seagreen1 has a contrast ratio of 16.18:1 with black text and 1.30:1 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 Seagreen1?

The closest Pantone reference to Seagreen1 by ΔE2000 perceptual distance is Pantone 367 C (#A4D65E). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.

What is the closest RAL color to Seagreen1?

The closest RAL Classic reference to Seagreen1 by ΔE2000 distance is RAL 6019 (Pastel green, #BDECB6). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.

What is the complementary color of Seagreen1?

The complementary color (180° opposite on the HSL color wheel) of Seagreen1 is #FF52B4. 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 · Seagreen1 — #54FF9F | PantoneTools