#040C2D#040C2D

#040C2D is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.3% C 0.068 H 266.6°. Best body text is #FFFFFF at 19.17:1 contrast (WCAG AA passes).

Color values

HEX	#040C2D
RGB	rgb(4, 12, 45)
HSL	hsl(228, 84%, 10%)
HSV	hsv(228, 91%, 18%)
CMYK	cmyk(91.1%, 73.3%, 0%, 82.4%)
CIE-LAB	lab(4.32, 8.22, -22.11)
CIE-LCH	lch(4.32, 23.59, 290.38°)
OKLab	oklab(17.26% -0.0041 -0.0678)
OKLCH	oklch(17.26% 0.068 266.6)
XYZ	xyz(0.6550, 0.4781, 2.5399)
Luminance	0.0048 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.95

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040C2D #2D2504

analogous

#04212D #040C2D #11042D

triadic

#040C2D #2D040C #0C2D04

tetradic

#040C2D #2D0421 #2D2504 #042D11

square

#040C2D #2D0421 #2D2504 #042D11

split-complementary

#040C2D #2D1104 #212D04

monochromatic

#02071C #02071C #040C2D #091B65 #0E2A9D

Accessibility & contrast

On white

19.17

#040C2D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040C2D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040C2D

19.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040C2D	#FFFFFF	#000000	##FFFFFF
##040C2D	1.00	19.17	1.10	19.17
#FFFFFF	19.17	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00112E

Deuteranopia (green-blind)

#000D2C

Tritanopia (blue-blind)

#00141A

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040c2d;
/* rgb */ color: rgb(4, 12, 45);
/* oklch */ color: oklch(17.3% 0.068 266.6);

Tailwind

colors: {
  custom: {
    50: '#4a4c66',
    500: '#040c2d',
    950: '#000000',
  },
}

SCSS

$custom: #040c2d;
$custom-light: #4a4c66;
$custom-dark: #000000;

JSON

{
  "hex": "#040c2d",
  "rgb": {
    "r": 4,
    "g": 12,
    "b": 45
  },
  "hsl": {
    "h": 228.293,
    "s": 83.673,
    "l": 9.608
  },
  "oklch": {
    "l": 0.17259,
    "c": 0.06789,
    "h": 266.6
  },
  "luminance": 0.00478
}

Semantic roles & 50–950 ramp

primary

#040C2D

secondary

#70601D

accent

#D22EFA

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040C2D

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

Preview Lab → · Contrast checker → · Palette generator →