The hexadecimal color code #21D489 represents a medium shade in the cyan family. In the RGB color model, this color is composed of 33 red, 212 green, and 137 blue, which translates to approximately 13% red, 83% green, and 54% 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, #21D489 has a hue of 155 degrees, a saturation level of 73%, and a lightness value of 48%. The hue angle of 155° places this color firmly in the cyan spectrum. In the HSV/HSB color model, this translates to a hue of 155°, saturation of 84%, and brightness/value of 83%.
For print applications using the CMYK color model, #21D489 would be reproduced using 84% cyan, 0% magenta, 35% yellow, and 17% black. The closest web-safe color is #33CC99, 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 #21D489 with other colors, consider its complementary color at hue 335° for maximum contrast, or use analogous colors within 30° of its hue for harmonious combinations. The decimal representation of this color is 2217097, which can be useful in certain programming contexts.
🔢 Color Conversion Codes for #21D489
Tailwind CSS
emerald-400
HEX
#21D489
RGB
rgb(33, 212, 137)
RGB %
13%, 83%, 54%
HSL
hsl(155, 73%, 48%)
HSV
hsv(155, 84%, 83%)
CMYK
84%, 0%, 35%, 17%
Decimal
2217097
Web Safe
#33CC99
🎨 Color Schemes for #21D489
Complementary
Analogous
Triadic
Split Complementary
Tetradic (Rectangle)
🔄 Alternatives to #21D489
🌗 Shades and Tints of #21D489
Shades (adding black)
Tints (adding white)
🎚️ Tones of #21D489
Tones (adding gray / desaturating)
🌈 Hue Variations of #21D489
Hue Variations (shifting the color spectrum)
👁️ Preview of #21D489 in Use
Text on #21D489
This demonstrates text readability on the color background. (Click to edit)
#21D489 as Text
This shows the color used as text on white. (Click to edit)
👓 Color Blindness Simulation for #21D489
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 Teal is a medium, vibrant, cool cyan color with a hue angle of 155°, saturation of 73%, and lightness of 48%. Its RGB value is (33, 212, 137) and its CMYK breakdown is C:84% M:0% Y:35% K:17%.
This is a Spring (Vital) color palette archetype. Calm, Clarity, Communication, Tech. Cyan/Teal promotes clear thinking and emotional balance.
Frequently Asked Questions About #21D489
What is the HEX code for Cool Teal? +
The HEX code for Cool Teal is #21D489. In CSS you can use it directly as color: #21D489; or as a background: background-color: #21D489;. 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 #21D489? +
The RGB value of #21D489 is rgb(33, 212, 137). This means the color contains 33 out of 255 parts red, 212 out of 255 parts green, and 137 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, 212, 137);
What is the HSL value of #21D489? +
The HSL value of #21D489 is hsl(155, 73%, 48%). The hue is 155°, placing it in the cyan family on the color wheel. The saturation is 73%, making it vibrant. The lightness is 48%, 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 #21D489 a warm or cool color? +
#21D489 is classified as a cool color based on its hue angle of 155°. 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 #21D489? +
The approximate CMYK value of #21D489 is C:84% M:0% Y:35% K:17%. 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.
