#040B2E colour

#040B2E is a very dark blue close to CSS midnightblue. RGB 4, 11, 46, HSL 230, 84%, 10%. White text passes AAA (19.22:1), black fails (1.09:1).

#040B2E

Nearest CSS name: midnightblue #191970 (not an exact match)
Described as: a very dark blue
Red, green, blue: 4, 11, 46
Web safe: No
Luminance: 0.0046 (WCAG relative luminance, 0 is black, 1 is white)

Colour codes

HEX	`#040b2e`
RGB	`rgb(4, 11, 46)`
RGB (percent)	`rgb(1.6% 4.3% 18%)`
HSL	`hsl(230, 84%, 9.8%)`
HSV / HSB	`hsv(230, 91.3%, 18%)`
HWB	`hwb(230 1.6% 82%)`
CMYK (naive)	`cmyk(91%, 76%, 0%, 82%)`
CIELAB (D50)	`lab(3.91% 6.29 -23.41)`
OKLCH	`oklch(17.13% 0.0711 267.36)`
Decimal	`265006`

CMYK here is the plain formula with no colour profile, so treat it as a starting point; a printer's profile gives the real ink values. CIELAB uses a D50 white point, as CSS lab() does. HSV is not a CSS function, so it is shown for design apps only.

Contrast with white and black text

White text, 19.22:1The quick brown fox jumps over the lazy dog.

Black text, 1.09:1The quick brown fox jumps over the lazy dog.

Text	Ratio	AA normal (4.5)	AA large (3)	AAA normal (7)	AAA large (4.5)
White	19.22:1	Pass	Pass	Pass	Pass
Black	1.09:1	Fail	Fail	Fail	Fail

White text is the better choice on #040B2E (19.22:1). Ratios use the WCAG 2.2 formula; large text means at least 24px, or 18.66px bold. Check another pair.

Tints and shades

Mixed with white, then with black, in ten even steps (straight sRGB mixing, as most design tools do).

9%#1b2141 18%#323754 27%#484e67 36%#5f647a 45%#767a8d 55%#8d90a0 64%#a4a6b3 73%#bbbcc6 82%#d1d3d9 91%#e8e9ec

9%#040a2a 18%#030926 27%#030821 36%#03071d 45%#020619 55%#020515 64%#010411 73%#01030d 82%#010208 91%#000104

Colour harmonies

Hue turned around the HSL colour wheel, saturation and lightness kept.

Complementary

The hue opposite on the colour wheel (180°).

#040b2e #2e2704

Analogous

Neighbours 30° either side.

#04202e #040b2e #12042e

Triadic

Three hues 120° apart.

#040b2e #2e040b #0b2e04

Split complementary

The two hues either side of the complement (150° and 210°).

#040b2e #2e1204 #202e04

Tetradic (square)

Four hues 90° apart.

#040b2e #2e0420 #2e2704 #042e12

How it looks with colour blindness

Normal vision#040b2e Protanopia#00112f Deuteranopia#000d2d Tritanopia#00141a Achromatopsia#0f0f0f

Simulated with the Machado, Oliveira and Fernandes (2009) matrices at full severity, applied in linear RGB; achromatopsia shows the colour's luminance as grey. Milder forms (protanomaly, deuteranomaly) are far more common and shift colours less. Never use colour as the only way to carry meaning.

CSS

Text colour	`color: #040b2e;`
Background	`background-color: #040b2e;`
Border	`border: 1px solid #040b2e;`
Half transparent	`background-color: rgb(4 11 46 / 50%);`
Custom property	`--colour-main: #040b2e;`
Gradient to a darker shade	`background: linear-gradient(135deg, #040b2e, #02071c);`
Gradient from a lighter tint	`background: linear-gradient(180deg, #686d82, #040b2e);`
Text on this colour	`background-color: #040b2e; color: #fff;`

Similar named colours

Distance is measured in OKLab, scaled by 100; under about 2 is hard to tell apart side by side.

Convert #040B2E to other formats · Build a palette from it · Check contrast · All named colours

Colour names from CSS Color Module Level 4. Palette values from the Tailwind CSS v3 default palette (MIT licence) and the Material Design 2014 colour palette as published in Material Design Lite (Apache License 2.0). All other values are calculated from the hex code.