#03031B#03031B

#03031B is a very dark, muted blue. Relative luminance 0.002; OKLCH L 12.3% C 0.055 H 274.6°. Best body text is #FFFFFF at 20.33:1 contrast (WCAG AA passes).

Color values

HEX	#03031B
RGB	rgb(3, 3, 27)
HSL	hsl(240, 80%, 6%)
HSV	hsv(240, 89%, 11%)
CMYK	cmyk(88.9%, 88.9%, 0%, 89.4%)
CIE-LAB	lab(1.48, 4.60, -12.49)
CIE-LCH	lch(1.48, 13.31, 290.23°)
OKLab	oklab(12.27% 0.0044 -0.0551)
OKLCH	oklch(12.27% 0.055 274.6)
XYZ	xyz(0.2679, 0.1636, 1.0542)
Luminance	0.0016 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#03031B #1B1B03

analogous

#030F1B #03031B #0F031B

triadic

#03031B #1B0303 #031B03

tetradic

#03031B #1B030F #1B1B03 #031B0F

square

#03031B #1B030F #1B1B03 #031B0F

split-complementary

#03031B #1B0F03 #0F1B03

monochromatic

#03031C #03031C #03031C #090952 #0F0F89

Accessibility & contrast

On white

20.33

#03031B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.03

#03031B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #03031B

20.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##03031B	#FFFFFF	#000000	##FFFFFF
##03031B	1.00	20.33	1.03	20.33
#FFFFFF	20.33	1.00	21.00	1.00
#000000	1.03	21.00	1.00	21.00
##FFFFFF	20.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00061C

Deuteranopia (green-blind)

#00051B

Tritanopia (blue-blind)

#00080D

Achromatopsia (no color)

#050505

Design tokens & code

CSS

--color: #03031b;
/* rgb */ color: rgb(3, 3, 27);
/* oklch */ color: oklch(12.3% 0.055 274.6);

Tailwind

colors: {
  custom: {
    50: '#474857',
    500: '#03031b',
    950: '#000000',
  },
}

SCSS

$custom: #03031b;
$custom-light: #474857;
$custom-dark: #000000;

JSON

{
  "hex": "#03031b",
  "rgb": {
    "r": 3,
    "g": 3,
    "b": 27
  },
  "hsl": {
    "h": 240,
    "s": 80,
    "l": 5.882
  },
  "oklch": {
    "l": 0.12273,
    "c": 0.05526,
    "h": 274.6
  },
  "luminance": 0.00164
}

Semantic roles & 50–950 ramp

primary

#03031B

secondary

#5F5F1B

accent

#F631F6

background

#F4F4F5

surface

#E6E6E9

border

#C2C2C5

text

#000003

muted

#777778

Preview Lab

Preview with #03031B

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

Preview Lab → · Contrast checker → · Palette generator →