#04031F#04031F

#04031F is a very dark, moderate blue. Relative luminance 0.002; OKLCH L 13.0% C 0.061 H 276.2°. Best body text is #FFFFFF at 20.23:1 contrast (WCAG AA passes).

Color values

HEX	#04031F
RGB	rgb(4, 3, 31)
HSL	hsl(242, 82%, 7%)
HSV	hsv(242, 90%, 12%)
CMYK	cmyk(87.1%, 90.3%, 0%, 87.8%)
CIE-LAB	lab(1.71, 6.12, -15.35)
CIE-LCH	lch(1.71, 16.52, 291.75°)
OKLab	oklab(12.97% 0.0067 -0.061)
OKLCH	oklch(12.97% 0.061 276.2)
XYZ	xyz(0.3299, 0.1898, 1.3153)
Luminance	0.0019 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 8.39

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04031F #1E1F03

analogous

#03101F #04031F #12031F

triadic

#04031F #1F0403 #031F04

tetradic

#04031F #1F0310 #1E1F03 #031F12

square

#04031F #1F0310 #1E1F03 #031F12

split-complementary

#04031F #1F1203 #101F03

monochromatic

#04031C #04031C #04031F #0B0857 #120E8F

Accessibility & contrast

On white

20.23

#04031F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.04

#04031F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04031F

20.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04031F	#FFFFFF	#000000	##FFFFFF
##04031F	1.00	20.23	1.04	20.23
#FFFFFF	20.23	1.00	21.00	1.00
#000000	1.04	21.00	1.00	21.00
##FFFFFF	20.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000720

Deuteranopia (green-blind)

#00051E

Tritanopia (blue-blind)

#00090F

Achromatopsia (no color)

#060606

Design tokens & code

CSS

--color: #04031f;
/* rgb */ color: rgb(4, 3, 31);
/* oklch */ color: oklch(13.0% 0.061 276.2);

Tailwind

colors: {
  custom: {
    50: '#48485a',
    500: '#04031f',
    950: '#000000',
  },
}

SCSS

$custom: #04031f;
$custom-light: #48485a;
$custom-dark: #000000;

JSON

{
  "hex": "#04031f",
  "rgb": {
    "r": 4,
    "g": 3,
    "b": 31
  },
  "hsl": {
    "h": 242.143,
    "s": 82.353,
    "l": 6.667
  },
  "oklch": {
    "l": 0.12973,
    "c": 0.06141,
    "h": 276.2
  },
  "luminance": 0.0019
}

Semantic roles & 50–950 ramp

primary

#04031F

secondary

#61631B

accent

#F92FF1

background

#F4F4F5

surface

#E6E6E9

border

#C2C2C5

text

#000004

muted

#777779

Preview Lab

Preview with #04031F

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

Preview Lab → · Contrast checker → · Palette generator →