The hexadecimal color code #428A8A represents a dark shade in the cyan family. In the RGB color model, this color is composed of 66 red, 138 green, and 138 blue, which translates to approximately 26% red, 54% green, and 54% blue. This makes it a slightly desaturated color with cool undertones that can evoke different emotional responses depending on its application.
When analyzed in the HSL (Hue, Saturation, Lightness) color space, #428A8A has a hue of 180 degrees, a saturation level of 35%, and a lightness value of 40%. The hue angle of 180° places this color firmly in the cyan spectrum. In the HSV/HSB color model, this translates to a hue of 180°, saturation of 52%, and brightness/value of 54%.
For print applications using the CMYK color model, #428A8A would be reproduced using 52% cyan, 0% magenta, 0% yellow, and 46% black. The closest web-safe color is #339999, 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 moderate to low saturation gives this color a sophisticated, muted quality that works well in professional and minimalist designs. When pairing #428A8A with other colors, consider its complementary color at hue 0° for maximum contrast, or use analogous colors within 30° of its hue for harmonious combinations. The decimal representation of this color is 4360842, which can be useful in certain programming contexts.
🔢 Color Conversion Codes for #428A8A
Tailwind CSS
slate-500
HEX
#428A8A
RGB
rgb(66, 138, 138)
RGB %
26%, 54%, 54%
HSL
hsl(180, 35%, 40%)
HSV
hsv(180, 52%, 54%)
CMYK
52%, 0%, 0%, 46%
Decimal
4360842
Web Safe
#339999
🎨 Color Schemes for #428A8A
Complementary
Analogous
Triadic
Split Complementary
Tetradic (Rectangle)
🔄 Alternatives to #428A8A
🌗 Shades and Tints of #428A8A
Shades (adding black)
Tints (adding white)
🎚️ Tones of #428A8A
Tones (adding gray / desaturating)
🌈 Hue Variations of #428A8A
Hue Variations (shifting the color spectrum)
👁️ Preview of #428A8A in Use
Text on #428A8A
This demonstrates text readability on the color background. (Click to edit)
#428A8A as Text
This shows the color used as text on white. (Click to edit)
👓 Color Blindness Simulation for #428A8A
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 Cyan is a medium, moderately saturated, cool cyan color with a hue angle of 180°, saturation of 35%, and lightness of 40%. Its RGB value is (66, 138, 138) and its CMYK breakdown is C:52% M:0% Y:0% K:46%.
This is a Summer (Cool) color palette archetype. Calm, Clarity, Communication, Tech. Cyan/Teal promotes clear thinking and emotional balance.
Frequently Asked Questions About #428A8A
What is the HEX code for Dark Cyan? +
The HEX code for Dark Cyan is #428A8A. In CSS you can use it directly as color: #428A8A; or as a background: background-color: #428A8A;. 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 #428A8A? +
The RGB value of #428A8A is rgb(66, 138, 138). This means the color contains 66 out of 255 parts red, 138 out of 255 parts green, and 138 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(66, 138, 138);
What is the HSL value of #428A8A? +
The HSL value of #428A8A is hsl(180, 35%, 40%). The hue is 180°, placing it in the cyan family on the color wheel. The saturation is 35%, making it moderately saturated. The lightness is 40%, 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 #428A8A a warm or cool color? +
#428A8A is classified as a cool color based on its hue angle of 180°. 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 #428A8A? +
The approximate CMYK value of #428A8A is C:52% M:0% Y:0% K:46%. 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.
