The hexadecimal color code #EF660B represents a medium shade in the red family. In the RGB color model, this color is composed of 239 red, 102 green, and 11 blue, which translates to approximately 94% red, 40% green, and 4% blue. This makes it a highly saturated color with warm undertones that can evoke different emotional responses depending on its application.
When analyzed in the HSL (Hue, Saturation, Lightness) color space, #EF660B has a hue of 24 degrees, a saturation level of 91%, and a lightness value of 49%. The hue angle of 24° places this color firmly in the red spectrum. In the HSV/HSB color model, this translates to a hue of 24°, saturation of 95%, and brightness/value of 94%.
For print applications using the CMYK color model, #EF660B would be reproduced using 0% cyan, 57% magenta, 95% yellow, and 6% black. The closest web-safe color is #FF6600, 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 #EF660B with other colors, consider its complementary color at hue 204° for maximum contrast, or use analogous colors within 30° of its hue for harmonious combinations. The decimal representation of this color is 15689227, which can be useful in certain programming contexts.
🔢 Color Conversion Codes for #EF660B
Tailwind CSS
orange-600
HEX
#EF660B
RGB
rgb(239, 102, 11)
RGB %
94%, 40%, 4%
HSL
hsl(24, 91%, 49%)
HSV
hsv(24, 95%, 94%)
CMYK
0%, 57%, 95%, 6%
Decimal
15689227
Web Safe
#FF6600
🎨 Color Schemes for #EF660B
Complementary
Analogous
Triadic
Split Complementary
Tetradic (Rectangle)
🔄 Alternatives to #EF660B
🌗 Shades and Tints of #EF660B
Shades (adding black)
Tints (adding white)
🎚️ Tones of #EF660B
Tones (adding gray / desaturating)
🌈 Hue Variations of #EF660B
Hue Variations (shifting the color spectrum)
👁️ Preview of #EF660B in Use
Text on #EF660B
This demonstrates text readability on the color background. (Click to edit)
#EF660B as Text
This shows the color used as text on white. (Click to edit)
👓 Color Blindness Simulation for #EF660B
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.
Vivid Vermilion is a medium, vibrant, warm red color with a hue angle of 24°, saturation of 91%, and lightness of 49%. Its RGB value is (239, 102, 11) and its CMYK breakdown is C:0% M:57% Y:95% K:6%.
This is a Summer (Cool) color palette archetype. Passion, Energy, Action, Danger. Red is a powerful color that evokes strong emotions and captures attention immediately.
Frequently Asked Questions About #EF660B
What is the HEX code for Vivid Vermilion? +
The HEX code for Vivid Vermilion is #EF660B. In CSS you can use it directly as color: #EF660B; or as a background: background-color: #EF660B;. 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 #EF660B? +
The RGB value of #EF660B is rgb(239, 102, 11). This means the color contains 239 out of 255 parts red, 102 out of 255 parts green, and 11 out of 255 parts blue. Red is the strongest channel in this color mix. You can use the full RGB function in any CSS property: color: rgb(239, 102, 11);
What is the HSL value of #EF660B? +
The HSL value of #EF660B is hsl(24, 91%, 49%). The hue is 24°, placing it in the red family on the color wheel. The saturation is 91%, making it vibrant. The lightness is 49%, 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 #EF660B a warm or cool color? +
#EF660B is classified as a warm color based on its hue angle of 24°. Warm colors — reds, oranges, and yellows — evoke energy, enthusiasm, and urgency. They tend to advance visually and draw the eye. In design, warm colors are often used for calls-to-action, food and hospitality brands, and anywhere a feeling of warmth or excitement is desired.
What is the CMYK value of #EF660B? +
The approximate CMYK value of #EF660B is C:0% M:57% Y:95% K:6%. 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.
