Darkblue colour (#00008B)
Darkblue is dark a blue with hex code #00008B, one of the 148 named colours every browser understands, so you can write color: ${name} directly in CSS. In RGB it is 0, 0, 139; in HSL 240°, 100%, 27%. Use the tool to explore shades and harmonies.
How to use the Darkblue colour
- The colour is pre-filled; click Explore to see all formats, shades and harmonies.
- Edit the value to try a variation.
- Copy the code you need.
Darkblue in every format
| Format | Value |
|---|---|
| HEX | #00008B |
| RGB | rgb(0, 0, 139) |
| RGB (0–1) | 0.000, 0.000, 0.545 |
| HSL | hsl(240, 100%, 27%) |
| CMYK (approx.) | 100%, 100%, 0%, 45% |
| CSS | color: darkblue; |
Shades and tints of Darkblue
Same hue and saturation, lightness from 90% to 10%:
#ccccff | #9999ff | #6666ff | #3333ff | #0000ff | #0000cc | #000099 | #000066 | #000033 |
Colours that go with Darkblue
| Harmony | Colours | |
|---|---|---|
| Complementary | #8a8a00 | |
| Triadic | #8a0000 | #008a00 |
| Analogous | #45008a | #00458a |
Similar named colours
The closest CSS named colours by RGB distance, useful when you need a keyword instead of a hex code or want a near match:
| Colour | HEX | Difference |
|---|---|---|
| navy | #000080 | very close |
| midnightblue | #191970 | close |
| mediumblue | #0000cd | close |
| indigo | #4b0082 | close |
| darkslateblue | #483d8b | noticeably different |
Accessibility
Contrast ratio of Darkblue against white is 15.3:1 (passes WCAG AA for normal text) and against black 1.37:1 (fails). Use Darkblue for text on white backgrounds.
Frequently asked questions
What is the hex code for Darkblue?
#00008B.
What is Darkblue in RGB?
rgb(0, 0, 139).
What colour is complementary to Darkblue?
#8a8a00, directly opposite on the colour wheel.
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Last updated 2026-09-23.