The hexadecimal color code #123F21 represents a very dark shade in the green family. In the RGB color model, this color is composed of 18 red, 63 green, and 33 blue, which translates to approximately 7% red, 25% green, and 13% blue. This makes it a moderately saturated color with cool undertones that can evoke different emotional responses depending on its application.
When analyzed in the HSL (Hue, Saturation, Lightness) color space, #123F21 has a hue of 140 degrees, a saturation level of 56%, and a lightness value of 16%. The hue angle of 140° places this color firmly in the green spectrum. In the HSV/HSB color model, this translates to a hue of 140°, saturation of 71%, and brightness/value of 25%.
For print applications using the CMYK color model, #123F21 would be reproduced using 71% cyan, 0% magenta, 48% yellow, and 75% black. The closest web-safe color is #003333, which may be useful for ensuring compatibility across older displays and systems.
This color works well in various design contexts. As a darker shade, it works well for text, headers, and creating visual weight in compositions. The moderate to low saturation gives this color a sophisticated, muted quality that works well in professional and minimalist designs. When pairing #123F21 with other colors, consider its complementary color at hue 320° for maximum contrast, or use analogous colors within 30° of its hue for harmonious combinations. The decimal representation of this color is 1195809, which can be useful in certain programming contexts.
🔢 Color Conversion Codes for #123F21
Tailwind CSS
green-900
HEX
#123F21
RGB
rgb(18, 63, 33)
RGB %
7%, 25%, 13%
HSL
hsl(140, 56%, 16%)
HSV
hsv(140, 71%, 25%)
CMYK
71%, 0%, 48%, 75%
Decimal
1195809
Web Safe
#003333
🎨 Color Schemes for #123F21
Complementary
Analogous
Triadic
Split Complementary
Tetradic (Rectangle)
🔄 Alternatives to #123F21
🌗 Shades and Tints of #123F21
Shades (adding black)
Tints (adding white)
🎚️ Tones of #123F21
Tones (adding gray / desaturating)
🌈 Hue Variations of #123F21
Hue Variations (shifting the color spectrum)
👁️ Preview of #123F21 in Use
Text on #123F21
This demonstrates text readability on the color background. (Click to edit)
#123F21 as Text
This shows the color used as text on white. (Click to edit)
👓 Color Blindness Simulation for #123F21
Check how a color is perceived by people with different types of color blindness to create more accessible designs. Understanding color perception helps ensure your content is accessible to everyone.
Deep Cool Emerald is a dark, moderately saturated, cool green color with a hue angle of 140°, saturation of 56%, and lightness of 16%. Its RGB value is (18, 63, 33) and its CMYK breakdown is C:71% M:0% Y:48% K:75%.
This is a Winter (Deep) color palette archetype. Nature, Growth, Harmony, Health. Green suggests stability and endurance, bridging the warm and cool colors.
Frequently Asked Questions About #123F21
What is the HEX code for Deep Cool Emerald? +
The HEX code for Deep Cool Emerald is #123F21. In CSS you can use it directly as color: #123F21; or as a background: background-color: #123F21;. The three-character shorthand is not available for this color since it cannot be reduced without changing the value. Use the full six-character hex for accurate reproduction in any web or design project.
What is the RGB value of #123F21? +
The RGB value of #123F21 is rgb(18, 63, 33). This means the color contains 18 out of 255 parts red, 63 out of 255 parts green, and 33 out of 255 parts blue. Red is the weakest (with blue dominant) channel in this color mix. You can use the full RGB function in any CSS property: color: rgb(18, 63, 33);
What is the HSL value of #123F21? +
The HSL value of #123F21 is hsl(140, 56%, 16%). The hue is 140°, placing it in the green family on the color wheel. The saturation is 56%, making it moderately saturated. The lightness is 16%, making it dark. HSL is the most useful format for programmatic color manipulation in CSS, as you can easily adjust lightness to create tints and shades.
Is #123F21 a warm or cool color? +
#123F21 is classified as a cool color based on its hue angle of 140°. Cool colors — blues, greens, and purples — evoke calm, trust, and professionalism. They tend to recede visually and create a feeling of space. In design, cool colors are often used for technology, healthcare, and finance brands, as well as anywhere a sense of calm or reliability is needed.
What is the CMYK value of #123F21? +
The approximate CMYK value of #123F21 is C:71% M:0% Y:48% K:75%. CMYK (Cyan, Magenta, Yellow, Key/Black) is the color model used in physical printing. Unlike RGB which mixes light additively on screens, CMYK mixes inks subtractively on paper. Note that the RGB-to-CMYK conversion is an approximation — screen colors and print colors exist in different color gamuts, and some screen colors cannot be exactly reproduced in print. For precise print work, consult a professional print color profile or Pantone matching system.
