The hexadecimal color code #21C4BF represents a medium shade in the cyan family. In the RGB color model, this color is composed of 33 red, 196 green, and 191 blue, which translates to approximately 13% red, 77% green, and 75% 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, #21C4BF has a hue of 178 degrees, a saturation level of 71%, and a lightness value of 45%. The hue angle of 178° places this color firmly in the cyan spectrum. In the HSV/HSB color model, this translates to a hue of 178°, saturation of 83%, and brightness/value of 77%.
For print applications using the CMYK color model, #21C4BF would be reproduced using 83% cyan, 0% magenta, 3% yellow, and 23% black. The closest web-safe color is #33CCCC, which may be useful for ensuring compatibility across older displays and systems.
This color works well in various design contexts. With its medium lightness, it's versatile enough for both foreground elements and subtle backgrounds. The high saturation makes this color vibrant and attention-grabbing, ideal for call-to-action buttons, highlights, and accent elements. When pairing #21C4BF with other colors, consider its complementary color at hue 358° for maximum contrast, or use analogous colors within 30° of its hue for harmonious combinations. The decimal representation of this color is 2213055, which can be useful in certain programming contexts.
🔢 Color Conversion Codes for #21C4BF
Tailwind CSS
teal-400
HEX
#21C4BF
RGB
rgb(33, 196, 191)
RGB %
13%, 77%, 75%
HSL
hsl(178, 71%, 45%)
HSV
hsv(178, 83%, 77%)
CMYK
83%, 0%, 3%, 23%
Decimal
2213055
Web Safe
#33CCCC
🎨 Color Schemes for #21C4BF
Complementary
Analogous
Triadic
Split Complementary
Tetradic (Rectangle)
🔄 Alternatives to #21C4BF
🌗 Shades and Tints of #21C4BF
Shades (adding black)
Tints (adding white)
🎚️ Tones of #21C4BF
Tones (adding gray / desaturating)
🌈 Hue Variations of #21C4BF
Hue Variations (shifting the color spectrum)
👁️ Preview of #21C4BF in Use
Text on #21C4BF
This demonstrates text readability on the color background. (Click to edit)
#21C4BF as Text
This shows the color used as text on white. (Click to edit)
👓 Color Blindness Simulation for #21C4BF
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.
Cool Cyan is a medium, vibrant, cool cyan color with a hue angle of 178°, saturation of 71%, and lightness of 45%. Its RGB value is (33, 196, 191) and its CMYK breakdown is C:83% M:0% Y:3% K:23%.
This is a Spring (Vital) color palette archetype. Calm, Clarity, Communication, Tech. Cyan/Teal promotes clear thinking and emotional balance.
Frequently Asked Questions About #21C4BF
What is the HEX code for Cool Cyan? +
The HEX code for Cool Cyan is #21C4BF. In CSS you can use it directly as color: #21C4BF; or as a background: background-color: #21C4BF;. 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 #21C4BF? +
The RGB value of #21C4BF is rgb(33, 196, 191). This means the color contains 33 out of 255 parts red, 196 out of 255 parts green, and 191 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(33, 196, 191);
What is the HSL value of #21C4BF? +
The HSL value of #21C4BF is hsl(178, 71%, 45%). The hue is 178°, placing it in the cyan family on the color wheel. The saturation is 71%, making it vibrant. The lightness is 45%, making it medium. HSL is the most useful format for programmatic color manipulation in CSS, as you can easily adjust lightness to create tints and shades.
Is #21C4BF a warm or cool color? +
#21C4BF is classified as a cool color based on its hue angle of 178°. 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 #21C4BF? +
The approximate CMYK value of #21C4BF is C:83% M:0% Y:3% K:23%. 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.
