#040C2E#040C2E

#040C2E is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.4% C 0.070 H 266.7°. Best body text is #FFFFFF at 19.14:1 contrast (WCAG AA passes).

Color values

HEX	#040C2E
RGB	rgb(4, 12, 46)
HSL	hsl(229, 84%, 10%)
HSV	hsv(229, 91%, 18%)
CMYK	cmyk(91.3%, 73.9%, 0%, 82%)
CIE-LAB	lab(4.39, 8.71, -22.75)
CIE-LCH	lch(4.39, 24.36, 290.95°)
OKLab	oklab(17.37% -0.004 -0.0695)
OKLCH	oklch(17.37% 0.07 266.7)
XYZ	xyz(0.6745, 0.4859, 2.6425)
Luminance	0.0049 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.63

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040C2E #2E2604

analogous

#04212E #040C2E #11042E

triadic

#040C2E #2E040C #0C2E04

tetradic

#040C2E #2E0421 #2E2604 #042E11

square

#040C2E #2E0421 #2E2604 #042E11

split-complementary

#040C2E #2E1104 #212E04

monochromatic

#02071C #02071C #040C2E #091B66 #0E299F

Accessibility & contrast

On white

19.14

#040C2E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040C2E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040C2E

19.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040C2E	#FFFFFF	#000000	##FFFFFF
##040C2E	1.00	19.14	1.10	19.14
#FFFFFF	19.14	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00112F

Deuteranopia (green-blind)

#000D2D

Tritanopia (blue-blind)

#00151B

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040c2e;
/* rgb */ color: rgb(4, 12, 46);
/* oklch */ color: oklch(17.4% 0.070 266.7);

Tailwind

colors: {
  custom: {
    50: '#4a4c67',
    500: '#040c2e',
    950: '#000000',
  },
}

SCSS

$custom: #040c2e;
$custom-light: #4a4c67;
$custom-dark: #000000;

JSON

{
  "hex": "#040c2e",
  "rgb": {
    "r": 4,
    "g": 12,
    "b": 46
  },
  "hsl": {
    "h": 228.571,
    "s": 84,
    "l": 9.804
  },
  "oklch": {
    "l": 0.17371,
    "c": 0.06959,
    "h": 266.7
  },
  "luminance": 0.00486
}

Semantic roles & 50–950 ramp

primary

#040C2E

secondary

#71611D

accent

#D32EFA

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040C2E

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

Preview Lab → · Contrast checker → · Palette generator →