The hexadecimal color code #151B61 represents a dark shade in the blue family. In the RGB color model, this color is composed of 21 red, 27 green, and 97 blue, which translates to approximately 8% red, 11% green, and 38% 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, #151B61 has a hue of 235 degrees, a saturation level of 64%, and a lightness value of 23%. 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 78%, and brightness/value of 38%.
For print applications using the CMYK color model, #151B61 would be reproduced using 78% cyan, 72% magenta, 0% yellow, and 62% black. The closest web-safe color is #003366, which may be useful for ensuring compatibility across older displays and systems.
This color works well in various design contexts. As a darker shade, it works well for text, headers, and creating visual weight in compositions. The high saturation makes this color vibrant and attention-grabbing, ideal for call-to-action buttons, highlights, and accent elements. When pairing #151B61 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 1383265, which can be useful in certain programming contexts.
🔢 Color Conversion Codes for #151B61
Tailwind CSS
blue-950
HEX
#151B61
RGB
rgb(21, 27, 97)
RGB %
8%, 11%, 38%
HSL
hsl(235, 64%, 23%)
HSV
hsv(235, 78%, 38%)
CMYK
78%, 72%, 0%, 62%
Decimal
1383265
Web Safe
#003366
🎨 Color Schemes for #151B61
Complementary
Analogous
Triadic
Split Complementary
Tetradic (Rectangle)
🔄 Alternatives to #151B61
🌗 Shades and Tints of #151B61
Shades (adding black)
Tints (adding white)
🎚️ Tones of #151B61
Tones (adding gray / desaturating)
🌈 Hue Variations of #151B61
Hue Variations (shifting the color spectrum)
👁️ Preview of #151B61 in Use
Text on #151B61
This demonstrates text readability on the color background. (Click to edit)
#151B61 as Text
This shows the color used as text on white. (Click to edit)
👓 Color Blindness Simulation for #151B61
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.
Deep Cool Blue is a dark, vibrant, cool blue color with a hue angle of 235°, saturation of 64%, and lightness of 23%. Its RGB value is (21, 27, 97) and its CMYK breakdown is C:78% M:72% Y:0% K:62%.
This is a Winter (Deep) color palette archetype. Trust, Loyalty, Wisdom, Confidence. Blue is considered beneficial to the mind and body.
Frequently Asked Questions About #151B61
What is the HEX code for Deep Cool Blue? +
The HEX code for Deep Cool Blue is #151B61. In CSS you can use it directly as color: #151B61; or as a background: background-color: #151B61;. 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 #151B61? +
The RGB value of #151B61 is rgb(21, 27, 97). This means the color contains 21 out of 255 parts red, 27 out of 255 parts green, and 97 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(21, 27, 97);
What is the HSL value of #151B61? +
The HSL value of #151B61 is hsl(235, 64%, 23%). The hue is 235°, placing it in the blue family on the color wheel. The saturation is 64%, making it vibrant. The lightness is 23%, making it dark. HSL is the most useful format for programmatic color manipulation in CSS, as you can easily adjust lightness to create tints and shades.
Is #151B61 a warm or cool color? +
#151B61 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 #151B61? +
The approximate CMYK value of #151B61 is C:78% M:72% Y:0% K:62%. 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.
