The hexadecimal color code #21636E represents a dark shade in the cyan family. In the RGB color model, this color is composed of 33 red, 99 green, and 110 blue, which translates to approximately 13% red, 39% green, and 43% 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, #21636E has a hue of 189 degrees, a saturation level of 54%, and a lightness value of 28%. The hue angle of 189° places this color firmly in the cyan spectrum. In the HSV/HSB color model, this translates to a hue of 189°, saturation of 70%, and brightness/value of 43%.
For print applications using the CMYK color model, #21636E would be reproduced using 70% cyan, 10% magenta, 0% yellow, and 57% black. The closest web-safe color is #336666, 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 #21636E with other colors, consider its complementary color at hue 9° for maximum contrast, or use analogous colors within 30° of its hue for harmonious combinations. The decimal representation of this color is 2188142, which can be useful in certain programming contexts.
🔢 Color Conversion Codes for #21636E
Tailwind CSS
cyan-800
HEX
#21636E
RGB
rgb(33, 99, 110)
RGB %
13%, 39%, 43%
HSL
hsl(189, 54%, 28%)
HSV
hsv(189, 70%, 43%)
CMYK
70%, 10%, 0%, 57%
Decimal
2188142
Web Safe
#336666
🎨 Color Schemes for #21636E
Complementary
Analogous
Triadic
Split Complementary
Tetradic (Rectangle)
🔄 Alternatives to #21636E
🌗 Shades and Tints of #21636E
Shades (adding black)
Tints (adding white)
🎚️ Tones of #21636E
Tones (adding gray / desaturating)
🌈 Hue Variations of #21636E
Hue Variations (shifting the color spectrum)
👁️ Preview of #21636E in Use
Text on #21636E
This demonstrates text readability on the color background. (Click to edit)
#21636E as Text
This shows the color used as text on white. (Click to edit)
👓 Color Blindness Simulation for #21636E
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.
Dark Cool Cyan is a dark, moderately saturated, cool cyan color with a hue angle of 189°, saturation of 54%, and lightness of 28%. Its RGB value is (33, 99, 110) and its CMYK breakdown is C:70% M:10% Y:0% K:57%.
This is a Winter (Deep) color palette archetype. Calm, Clarity, Communication, Tech. Cyan/Teal promotes clear thinking and emotional balance.
Frequently Asked Questions About #21636E
What is the HEX code for Dark Cool Cyan? +
The HEX code for Dark Cool Cyan is #21636E. In CSS you can use it directly as color: #21636E; or as a background: background-color: #21636E;. 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 #21636E? +
The RGB value of #21636E is rgb(33, 99, 110). This means the color contains 33 out of 255 parts red, 99 out of 255 parts green, and 110 out of 255 parts blue. Red is the moderate channel in this color mix. You can use the full RGB function in any CSS property: color: rgb(33, 99, 110);
What is the HSL value of #21636E? +
The HSL value of #21636E is hsl(189, 54%, 28%). The hue is 189°, placing it in the cyan family on the color wheel. The saturation is 54%, making it moderately saturated. The lightness is 28%, 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 #21636E a warm or cool color? +
#21636E is classified as a cool color based on its hue angle of 189°. 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 #21636E? +
The approximate CMYK value of #21636E is C:70% M:10% Y:0% K:57%. 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.
