Green3
green3 · #00CD00
HEX
#00CD00
RGB
rgb(0, 205, 0)
CMYK
cmyk(100%, 0%, 100%, 20%)
HSL
hsl(120, 100%, 40%)
LAB
lab(72.0, -73.1, 70.6)
What is Green3?
Green3 is the green3 reference in the X11 named colors. Its sRGB value is #00CD00 (rgb 0, 205, 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 Green3 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Green3
An 11-step tonal scale derived from Green3 (#00CD00). 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
#EBFBEB
#EBFBEB
100
#D6F7D6
#D6F7D6
200
#ADEFAD
#ADEFAD
300
#80E680
#80E680
400
#40DA40
#40DA40
500
#00CD00
#00CD00
600
#00AE00
#00AE00
700
#008500
#008500
800
#005C00
#005C00
900
#003300
#003300
950
#001900
#001900
Lighter tints (mixed with white)
15%
#6CD66C
30%
#95DE95
45%
#B3E5B3
60%
#CBEDCB
75%
#E1F4E1
Darker shades (mixed with black)
15%
#00BF00
30%
#00AF00
45%
#009D00
60%
#008700
75%
#006D00
Color harmonies for Green3
Classic color-theory harmonies derived from rotating the hue of Green3. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#00CD00
#00CD00
#CC00CC
#CC00CC
Triadic
Three colors 120° apart
#00CD00
#00CD00
#0000CC
#0000CC
#CC0000
#CC0000
Analogous
Two neighbors ±30° on the wheel
#66CC00
#66CC00
#00CD00
#00CD00
#00CC66
#00CC66
Split-complementary
Base + two colors flanking its complement
#00CD00
#00CD00
#6600CC
#6600CC
#CC0066
#CC0066
Tetradic
Two complementary pairs
#00CD00
#00CD00
#00CCCC
#00CCCC
#CC00CC
#CC00CC
#CC0000
#CC0000
Square
Four colors evenly spaced 90° apart
#00CD00
#00CD00
#0066CC
#0066CC
#CC00CC
#CC00CC
#CC6600
#CC6600
Green3 in every color space
Full conversion of Green3 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
#00CD00
RGB
rgb(0, 205, 0)
CMYK
cmyk(100%, 0%, 100%, 20%)
HSL
hsl(120, 100%, 40%)
HSV
hsv(120, 100%, 80%)
HWB
hwb(120 0% 20%)
CIE Lab
lab(72.0 -73.1 70.6)
OKLCH
oklch(73.5% 0.250 142.5)
XYZ (D65)
xyz(21.83, 43.66, 7.28)
Copy-ready code for Green3
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: #00CD00;
background-color: #00CD00;CSS variable
:root {
--color-green3: #00CD00;
}Tailwind config
// tailwind.config.js
colors: {
'green3': '#00CD00',
}Sass
$color-green3: #00CD00;Swift UIColor
UIColor(red: 0.000, green: 0.804, blue: 0.000, alpha: 1.0)Android XML
<color name="green3">#00CD00</color>Closest match in every color system
The nearest Green3 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 6018
#57A639
Yellow green
RAL 6021
#89AC76
Pale green
RAL 6017
#4C9141
May green
RAL 6019
#BDECB6
Pastel green
RAL 1000
#BEBD7F
Green beige
RAL 1020
#999950
Olive yellow
FAQ about Green3
What is the HEX code for Green3?
Green3 (green3) has the HEX code #00CD00. In RGB it is rgb(0, 205, 0), and in CMYK it is cmyk(100%, 0%, 100%, 20%).
What is the OKLCH value of Green3?
Green3 converts to oklch(0.735 0.250 142.5). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Green3 accessible for body text?
Used as a background, Green3 has a contrast ratio of 9.73:1 with black text and 2.16:1 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 Green3?
The closest Pantone reference to Green3 by ΔE2000 perceptual distance is Pantone 368 C (#78BE20). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Green3?
The closest RAL Classic reference to Green3 by ΔE2000 distance is RAL 6018 (Yellow green, #57A639). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Green3?
The complementary color (180° opposite on the HSL color wheel) of Green3 is #CC00CC. 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.