Chartreuse1
chartreuse1 · #7FFF00
HEX
#7FFF00
RGB
rgb(127, 255, 0)
CMYK
cmyk(50%, 0%, 100%, 0%)
HSL
hsl(90, 100%, 50%)
LAB
lab(89.9, -68.1, 85.8)
What is Chartreuse1?
Chartreuse1 is the chartreuse1 reference in the X11 named colors. Its sRGB value is #7FFF00 (rgb 127, 255, 0). 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 Chartreuse1 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Chartreuse1
An 11-step tonal scale derived from Chartreuse1 (#7FFF00). 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.
50
#F5FFEB
#F5FFEB
100
#EBFFD6
#EBFFD6
200
#D6FFAD
#D6FFAD
300
#BFFF80
#BFFF80
400
#9FFF40
#9FFF40
500
#7FFF00
#7FFF00
600
#6CD900
#6CD900
700
#53A600
#53A600
800
#397300
#397300
900
#204000
#204000
950
#0F1F00
#0F1F00
Lighter tints (mixed with white)
15%
#9CFF6C
30%
#B3FF95
45%
#C6FFB3
60%
#D8FFCB
75%
#E8FFE1
Darker shades (mixed with black)
15%
#76ED00
30%
#6CDA00
45%
#60C400
60%
#52AA00
75%
#418900
Color harmonies for Chartreuse1
Classic color-theory harmonies derived from rotating the hue of Chartreuse1. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#7FFF00
#7FFF00
#7F00FF
#7F00FF
Triadic
Three colors 120° apart
#7FFF00
#7FFF00
#007FFF
#007FFF
#FF0080
#FF0080
Analogous
Two neighbors ±30° on the wheel
#FFFF00
#FFFF00
#7FFF00
#7FFF00
#00FF00
#00FF00
Split-complementary
Base + two colors flanking its complement
#7FFF00
#7FFF00
#0000FF
#0000FF
#FF00FF
#FF00FF
Tetradic
Two complementary pairs
#7FFF00
#7FFF00
#00FF80
#00FF80
#7F00FF
#7F00FF
#FF0080
#FF0080
Square
Four colors evenly spaced 90° apart
#7FFF00
#7FFF00
#00FFFF
#00FFFF
#7F00FF
#7F00FF
#FF0000
#FF0000
Chartreuse1 in every color space
Full conversion of Chartreuse1 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
#7FFF00
RGB
rgb(127, 255, 0)
CMYK
cmyk(50%, 0%, 100%, 0%)
HSL
hsl(90, 100%, 50%)
HSV
hsv(90, 100%, 100%)
HWB
hwb(90 0% 0%)
CIE Lab
lab(89.9 -68.1 85.8)
OKLCH
oklch(89.0% 0.265 136.0)
XYZ (D65)
xyz(44.51, 76.03, 12.33)
Copy-ready code for Chartreuse1
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: #7FFF00;
background-color: #7FFF00;CSS variable
:root {
--color-chartreuse1: #7FFF00;
}Tailwind config
// tailwind.config.js
colors: {
'chartreuse1': '#7FFF00',
}Sass
$color-chartreuse1: #7FFF00;Swift UIColor
UIColor(red: 0.498, green: 1.000, blue: 0.000, alpha: 1.0)Android XML
<color name="chartreuse1">#7FFF00</color>Closest match in every color system
The nearest Chartreuse1 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.
Closest Pantone matches
Top 6 ΔE2000-closest Pantone references. Cross-system matching is approximate — see disclaimer.
Closest RAL Classic matches
Top 6 ΔE2000-closest RAL Classic references for industrial coating cross-reference.
RAL 1016
#EDFF21
Sulfur yellow
RAL 1026
#FFFF00
Luminous yellow
RAL 1018
#F8F32B
Zinc yellow
RAL 6019
#BDECB6
Pastel green
RAL 6018
#57A639
Yellow green
RAL 1000
#BEBD7F
Green beige
FAQ about Chartreuse1
What is the HEX code for Chartreuse1?
Chartreuse1 (chartreuse1) has the HEX code #7FFF00. In RGB it is rgb(127, 255, 0), and in CMYK it is cmyk(50%, 0%, 100%, 0%).
What is the OKLCH value of Chartreuse1?
Chartreuse1 converts to oklch(0.890 0.265 136.0). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Chartreuse1 accessible for body text?
Used as a background, Chartreuse1 has a contrast ratio of 16.21:1 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 Chartreuse1?
The closest Pantone reference to Chartreuse1 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 Chartreuse1?
The closest RAL Classic reference to Chartreuse1 by ΔE2000 distance is RAL 1016 (Sulfur yellow, #EDFF21). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Chartreuse1?
The complementary color (180° opposite on the HSL color wheel) of Chartreuse1 is #7F00FF. 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 colors are sRGB digital values from a 1980s color system. For print, convert to a process-appropriate color and proof against substrate.