The hexadecimal color code #1B233B represents a very dark shade in the blue family. In the RGB color model, this color is composed of 27 red, 35 green, and 59 blue, which translates to approximately 11% red, 14% green, and 23% 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, #1B233B has a hue of 225 degrees, a saturation level of 37%, and a lightness value of 17%. The hue angle of 225° places this color firmly in the blue spectrum. In the HSV/HSB color model, this translates to a hue of 225°, saturation of 54%, and brightness/value of 23%.
For print applications using the CMYK color model, #1B233B would be reproduced using 54% cyan, 41% magenta, 0% yellow, and 77% black. The closest web-safe color is #333333, 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 moderate to low saturation gives this color a sophisticated, muted quality that works well in professional and minimalist designs. When pairing #1B233B with other colors, consider its complementary color at hue 45° for maximum contrast, or use analogous colors within 30° of its hue for harmonious combinations. The decimal representation of this color is 1778491, which can be useful in certain programming contexts.
🔢 Color Conversion Codes for #1B233B
Tailwind CSS
slate-800
HEX
#1B233B
RGB
rgb(27, 35, 59)
RGB %
11%, 14%, 23%
HSL
hsl(225, 37%, 17%)
HSV
hsv(225, 54%, 23%)
CMYK
54%, 41%, 0%, 77%
Decimal
1778491
Web Safe
#333333
🎨 Color Schemes for #1B233B
Complementary
Analogous
Triadic
Split Complementary
Tetradic (Rectangle)
🔄 Alternatives to #1B233B
🌗 Shades and Tints of #1B233B
Shades (adding black)
Tints (adding white)
🎚️ Tones of #1B233B
Tones (adding gray / desaturating)
🌈 Hue Variations of #1B233B
Hue Variations (shifting the color spectrum)
👁️ Preview of #1B233B in Use
Text on #1B233B
This demonstrates text readability on the color background. (Click to edit)
#1B233B as Text
This shows the color used as text on white. (Click to edit)
👓 Color Blindness Simulation for #1B233B
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 Blue is a dark, moderately saturated, cool blue color with a hue angle of 225°, saturation of 37%, and lightness of 17%. Its RGB value is (27, 35, 59) and its CMYK breakdown is C:54% M:41% Y:0% K:77%.
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 #1B233B
What is the HEX code for Deep Blue? +
The HEX code for Deep Blue is #1B233B. In CSS you can use it directly as color: #1B233B; or as a background: background-color: #1B233B;. 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 #1B233B? +
The RGB value of #1B233B is rgb(27, 35, 59). This means the color contains 27 out of 255 parts red, 35 out of 255 parts green, and 59 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(27, 35, 59);
What is the HSL value of #1B233B? +
The HSL value of #1B233B is hsl(225, 37%, 17%). The hue is 225°, placing it in the blue family on the color wheel. The saturation is 37%, making it moderately saturated. The lightness is 17%, 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 #1B233B a warm or cool color? +
#1B233B is classified as a cool color based on its hue angle of 225°. 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 #1B233B? +
The approximate CMYK value of #1B233B is C:54% M:41% Y:0% K:77%. 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.
