Dark Green (X11)

HEX: #006400 | Modern Palette

On White
7.44:1
PASS
On Black
2.82:1
FAIL

Color Specifications

HEX
#006400
RGB
0, 100, 0
HSL
120°, 100% ,39%
CMYK
100, 0, 100, 60.78

About Dark Green (X11)

Dark Green (X11) (#006400) is a color with RGB(0, 100, 0) and HSL(120°, 100%, 39.22%). It is commonly associated with Bold moods. In design, it fits Vivid, Cool styles and is suitable for Text, Button, Accent. Its complementary color is #640064, which creates strong contrast. Its triadic palette includes #000064 and #640000. The name comes from Dark Green (English).

  • HEX: #006400
  • RGB: 0, 100, 0
  • HSL: 120°, 100%, 39.22%
  • Mood: Bold
  • Style: Vivid, Cool
  • Use case: Text, Button, Accent
  • Complementary color: #640064
  • Triadic colors: #000064, #640000
  • The name comes from Dark Green (English).

Live Components

LIGHT
DARK
System Notification Box

Color Palettes

Monochromatic Five tones of the same hue — a reliable scale for backgrounds, surfaces, and text.
Neutral + Accent Four near-neutral tones grounded by a saturated accent — clean and versatile for UI.
Analogous Five hues drifting across a 60° arc — naturally harmonious and pleasing to the eye.
3 + 1 + 1 Three analogous base colors, one complementary accent, one dark anchor — bold yet balanced.

Color Harmonies

Complementary

The color directly opposite on the color wheel — creates maximum contrast and vibrance.

Analogous

Colors adjacent on the wheel — naturally harmonious and pleasing to the eye.

Triadic

Three colors equally spaced 120° apart — bold, balanced, and visually rich.

Split-Complementary

Two colors flanking the complement — high contrast with less tension than full complementary.

Tetradic (Square)

Four colors at 90° intervals — rich variety, best when one color dominates.

Monochromatic

Shades and tints of the same hue — cohesive, elegant, and easy to work with.

Shades & Tints

A seamless scale of #006400 from deepest shade to lightest tint.

Color Characteristics

Mood
Bold
Style
Vivid Cool
Use case
Text Button Accent

Accessibility Simulation

Deuteranopia #555509
Protanopia #5F5F00
Tritanopia #235E5E
Achromatopsia #555555

Frequently Asked Questions

Dark Green (X11) (#006400) is a color with RGB(0, 100, 0) and HSL(120°, 100%, 39.22%).

#006400 pairs strongly with #640064 as its complementary color. It can also be used with neutral tones for balanced UI and design layouts.

#006400 is suitable for Text, Button, Accent and works well with Vivid, Cool styles.

#006400 is commonly associated with Bold.

The name Dark Green (X11) is linked to Dark Green from English, meaning A deep shade of green, often associated with nature and foliage..

Name, History & Etymology

Origin Word Dark Green
Meaning A deep shade of green, often associated with nature and foliage.
Language English
First Recorded Use Late Middle English

History

The concept of 'dark green' is ancient, referring to the deeper hues found in nature, such as dense forests or mature leaves. As a formal color name, its standardization is relatively recent, driven by digital color systems. The X11 color system, developed for the X Window System in the 1980s, provided a set of named colors for computer displays. This specific 'Dark Green (X11)' is one of the predefined colors within that system, ensuring consistent rendering across various platforms.

First Recorded Use

The term 'dark green' as a descriptive color combination has been in use for centuries, with 'dark' appearing in English from the Old English 'deorc' and 'green' from 'grēne'. Its specific use as a standardized color name, particularly with the X11 designation, emerged in the late 20th century.

Cultural Associations

Dark green often symbolizes nature, growth, and renewal, frequently appearing in environmental movements and military uniforms. It can also represent wealth and stability, particularly in Western cultures. Its presence in digital standards reflects the need for precise color communication in computing.

Similar Named Colors
Pakistan Green #006600 ΔE 0.65
Deep Green #056608 ΔE 0.87
Lincoln Green #195905 ΔE 3.97
La Salle Green #087830 ΔE 8.02

Code Snippets

/* Background */
.element {
    background-color: #006400;
}

/* Text */
.element {
    color: #006400;
}

/* Border */
.element {
    border: 1px solid #006400;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #006400,
        #C800C8
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #006400,
        #C800C8
    );
}

// SCSS variable
$dark-green-(x11): #006400;

// With RGB channels (useful for rgba() usage)
$dark-green-(x11)-r: 0;
$dark-green-(x11)-g: 100;
$dark-green-(x11)-b: 0;

// Usage
.element {
    background-color: $dark-green-(x11);
    color: rgba($dark-green-(x11)-r, $dark-green-(x11)-g, $dark-green-(x11)-b, 0.8);
}