Dark Blue (#00008B)
The hex code for Dark Blue is #00008B. It is rgb(0, 0, 139) in RGB, hsl(240, 100%, 27%) in HSL, and about cmyk(100%, 100%, 0%, 45%) in CMYK — a dark blue. White text is the more readable choice on this background.
#00008Brgb(0, 0, 139)hsl(240, 100%, 27%)hsv(240, 100%, 55%)cmyk(100%, 100%, 0%, 45%)oklch(28.8% 0.199 264.1)lab(13.02% 43.48 -71.34)lch(13.02% 83.54 301.36)Colors Closest to Dark Blue
Dark Blue is a registered color name. These are the named colors nearest to it, measured as CIE76 distance in CIELAB — a perceptual scale, so the ordering matches what the eye sees rather than how close the raw RGB numbers happen to sit.
Browse the full index of named colors A-Z or every blue in the library.
#00008B Channel Values
How Dark Blue breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.
| Model | Channels | Notes |
|---|---|---|
| RGB | R 0 · G 0 · B 139 | 8-bit channels as sent to the display |
| HSL | H 240° · S 100% · L 27% | Easiest model for building lighter and darker variants |
| HSV | H 240° · S 100% · V 55% | Matches the picker in most design tools |
| CMYK | C 100% · M 100% · Y 0% · K 45% | Approximate ink mix; confirm with an ICC profile before printing |
| Luminance | 15.3:1 vs white · 1.37:1 vs black | WCAG 2.2 relative-luminance contrast ratios |
Text Contrast & Accessibility
WCAG 2.2 contrast ratios for text on a Dark Blue background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.
Need a specific ratio against another background? Open #00008B in the contrast checker.
Colors That Go With Dark Blue
Pairings derived from color-wheel relationships. The complementary color sits opposite Dark Blue; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.
Tints & Shades of Dark Blue
Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.
Want a full 50-950 ramp with semantic roles? Generate design tokens from #00008B.
How Dark Blue Looks with Color Vision Deficiency
Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.
#00008B#00008B#00008B#00008B#00008B#003333#002662#252525Using #00008B in Code
Copy-ready declarations for the places this color usually ends up.
--dark-blue: #00008B;background-color: #00008B;colors: { 'dark-blue': '#00008B' }Color(red: 0.000, green: 0.000, blue: 0.545)<color name="dark_blue">#00008B</color>fill="#00008B"More Blue Colors
Dark Blue sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.
#00008B Frequently Asked Questions
What is the hex code for Dark Blue?
The hex code for Dark Blue is #00008B. That is rgb(0, 0, 139) in RGB, hsl(240, 100%, 27%) in HSL, and approximately cmyk(100%, 100%, 0%, 45%) in CMYK.
What is the RGB value of #00008B?
#00008B is rgb(0, 0, 139) — red 0, green 0, and blue 139 on the 0-255 scale.
What is the CMYK value of #00008B?
#00008B converts to approximately cmyk(100%, 100%, 0%, 45%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.
Should text on #00008B be black or white?
White text is the more readable choice. #00008B scores 15.3:1 against white and 1.37:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.
Is DarkBlue a CSS named color?
Yes. DarkBlue is one of the CSS named colors, so you can write color: darkblue instead of the hex code.
Open Dark Blue in a Tool
Keep exploring: every blue in the color library, the guide to shades of blue, or the full color library.