The hexadecimal color code #666CA9 represents a medium shade in the blue family. In the RGB color model, this color is composed of 102 red, 108 green, and 169 blue, which translates to approximately 40% red, 42% green, and 66% 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, #666CA9 has a hue of 235 degrees, a saturation level of 28%, and a lightness value of 53%. The hue angle of 235° places this color firmly in the blue spectrum. In the HSV/HSB color model, this translates to a hue of 235°, saturation of 40%, and brightness/value of 66%.
For print applications using the CMYK color model, #666CA9 would be reproduced using 40% cyan, 36% magenta, 0% yellow, and 34% black. The closest web-safe color is #666699, 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 #666CA9 with other colors, consider its complementary color at hue 55° for maximum contrast, or use analogous colors within 30° of its hue for harmonious combinations. The decimal representation of this color is 6712489, which can be useful in certain programming contexts.
🔢 Color Conversion Codes for #666CA9
Tailwind CSS
slate-500
HEX
#666CA9
RGB
rgb(102, 108, 169)
RGB %
40%, 42%, 66%
HSL
hsl(235, 28%, 53%)
HSV
hsv(235, 40%, 66%)
CMYK
40%, 36%, 0%, 34%
Decimal
6712489
Web Safe
#666699
🎨 Color Schemes for #666CA9
Complementary
Analogous
Triadic
Split Complementary
Tetradic (Rectangle)
🔄 Alternatives to #666CA9
🌗 Shades and Tints of #666CA9
Shades (adding black)
Tints (adding white)
🎚️ Tones of #666CA9
Tones (adding gray / desaturating)
🌈 Hue Variations of #666CA9
Hue Variations (shifting the color spectrum)
👁️ Preview of #666CA9 in Use
Text on #666CA9
This demonstrates text readability on the color background. (Click to edit)
#666CA9 as Text
This shows the color used as text on white. (Click to edit)
👓 Color Blindness Simulation for #666CA9
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.
Blue is a medium, moderately saturated, cool blue color with a hue angle of 235°, saturation of 28%, and lightness of 53%. Its RGB value is (102, 108, 169) and its CMYK breakdown is C:40% M:36% Y:0% K:34%.
This is a Summer (Cool) color palette archetype. Trust, Loyalty, Wisdom, Confidence. Blue is considered beneficial to the mind and body.
Frequently Asked Questions About #666CA9
What is the HEX code for Blue? +
The HEX code for Blue is #666CA9. In CSS you can use it directly as color: #666CA9; or as a background: background-color: #666CA9;. 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 #666CA9? +
The RGB value of #666CA9 is rgb(102, 108, 169). This means the color contains 102 out of 255 parts red, 108 out of 255 parts green, and 169 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(102, 108, 169);
What is the HSL value of #666CA9? +
The HSL value of #666CA9 is hsl(235, 28%, 53%). The hue is 235°, placing it in the blue family on the color wheel. The saturation is 28%, making it moderately saturated. The lightness is 53%, 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 #666CA9 a warm or cool color? +
#666CA9 is classified as a cool color based on its hue angle of 235°. 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 #666CA9? +
The approximate CMYK value of #666CA9 is C:40% M:36% Y:0% K:34%. 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.
