#040A2E#040A2E

#040A2E is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.9% C 0.073 H 268.0°. Best body text is #FFFFFF at 19.30:1 contrast (WCAG AA passes).

Color values

HEX	#040A2E
RGB	rgb(4, 10, 46)
HSL	hsl(231, 84%, 10%)
HSV	hsv(231, 91%, 18%)
CMYK	cmyk(91.3%, 78.3%, 0%, 82%)
CIE-LAB	lab(3.98, 9.56, -23.41)
CIE-LCH	lch(3.98, 25.28, 292.21°)
OKLab	oklab(16.9% -0.0025 -0.0726)
OKLCH	oklch(16.9% 0.073 268)
XYZ	xyz(0.6516, 0.4401, 2.6348)
Luminance	0.0044 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.14

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A2E #2E2804

analogous

#041F2E #040A2E #13042E

triadic

#040A2E #2E040A #0A2E04

tetradic

#040A2E #2E041F #2E2804 #042E13

square

#040A2E #2E041F #2E2804 #042E13

split-complementary

#040A2E #2E1304 #1F2E04

monochromatic

#02061C #02061C #040A2E #091666 #0E229F

Accessibility & contrast

On white

19.30

#040A2E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040A2E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A2E

19.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A2E	#FFFFFF	#000000	##FFFFFF
##040A2E	1.00	19.30	1.09	19.30
#FFFFFF	19.30	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00102F

Deuteranopia (green-blind)

#000C2D

Tritanopia (blue-blind)

#00141A

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #040a2e;
/* rgb */ color: rgb(4, 10, 46);
/* oklch */ color: oklch(16.9% 0.073 268.0);

Tailwind

colors: {
  custom: {
    50: '#4a4b67',
    500: '#040a2e',
    950: '#000000',
  },
}

SCSS

$custom: #040a2e;
$custom-light: #4a4b67;
$custom-dark: #000000;

JSON

{
  "hex": "#040a2e",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 46
  },
  "hsl": {
    "h": 231.429,
    "s": 84,
    "l": 9.804
  },
  "oklch": {
    "l": 0.16898,
    "c": 0.0726,
    "h": 268
  },
  "luminance": 0.0044
}

Semantic roles & 50–950 ramp

primary

#040A2E

secondary

#71651D

accent

#DD2EFA

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040A2E

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →