Dark Blue (CSS)

Dark Blue (CSS) is a very dark, saturated blue-violet color with the hex code #00008B (hue 240°, saturation 100%, lightness 27%). It is also the CSS named color darkblue.

#00008B

	Name	HEX	RGB	HSL	CMYK	OKLCH
	Dark Blue (CSS)	`#00008B`	0, 0, 139	240°, 100%, 27%	100, 100, 0, 45	28.8% 0.199 264

Contrast with white text 15.30:1, with black text 1.37:1 — use white text on Dark Blue (CSS).

darkblue is one of the 148 named colors in CSS, with exactly this value, so color: darkblue works in any browser without a hex code.

Huebook · Maintained by Iris Marlow (pen name) · automated checks · Data: color-name-list (MIT) for names; CSS Color Module Level 4 (W3C) for CSS named colors · Updated Oct 19, 2026 · How the checks work

Tints and shades

#CCCCFF

#8080FF

#3333FF

#0000E6

#000099

#00004D

Colors that go with Dark Blue (CSS)

Six color schemes built on Dark Blue (CSS) with classic harmony rules. The complementary scheme pairs it with Old Asparagus (#929000), the color opposite it on the color wheel.

Nearest CSS named colors

Navy (navy): Navy (#000080) is about as light as Dark Blue (CSS) (relative luminance 0.016 vs 0.019) and equally saturated, with the same hue.
Midnight Blue (midnightblue): Midnight Blue (#191970) is about as light as Dark Blue (CSS) (relative luminance 0.021 vs 0.019) and less saturated, with the same hue.
Medium Blue (mediumblue): Medium Blue (#0000CD) is lighter than Dark Blue (CSS) (relative luminance 0.044 vs 0.019) and equally saturated, with the same hue.
Indigo (indigo): Indigo (#4B0082) is lighter than Dark Blue (CSS) (relative luminance 0.031 vs 0.019) and equally saturated, with its hue 35° away.

Gradients with Dark Blue (CSS)

Dark Blue (CSS) to Indigo Static

Similar dark blue colors

Questions

What is the hex code for Dark Blue (CSS)?

#00008B — RGB 0, 0, 139, HSL 240°, 100%, 27%.

Is Dark Blue (CSS) a warm or cool color?

Cool — its hue sits at 240° on the color wheel.