#00031B#00031B

#00031B is a very dark, muted blue. Relative luminance 0.001; OKLCH L 11.7% C 0.059 H 262.9°. Best body text is #FFFFFF at 20.41:1 contrast (WCAG AA passes).

Color values

HEX	#00031B
RGB	rgb(0, 3, 27)
HSL	hsl(233, 100%, 5%)
HSV	hsv(233, 100%, 11%)
CMYK	cmyk(100%, 88.9%, 0%, 89.4%)
CIE-LAB	lab(1.30, 3.82, -12.77)
CIE-LCH	lch(1.30, 13.33, 286.65°)
OKLab	oklab(11.71% -0.0072 -0.0581)
OKLCH	oklch(11.71% 0.059 262.9)
XYZ	xyz(0.2303, 0.1442, 1.0524)
Luminance	0.0014 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#00031B #1B1800

analogous

#00101B #00031B #0A001B

triadic

#00031B #1B0003 #031B00

tetradic

#00031B #1B0010 #1B1800 #001B0A

square

#00031B #1B0010 #1B1800 #001B0A

split-complementary

#00031B #1B0A00 #101B00

monochromatic

#00031F #00031F #00031F #000A58 #001195

Accessibility & contrast

On white

20.41

#00031B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.03

#00031B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #00031B

20.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##00031B	#FFFFFF	#000000	##FFFFFF
##00031B	1.00	20.41	1.03	20.41
#FFFFFF	20.41	1.00	21.00	1.00
#000000	1.03	21.00	1.00	21.00
##FFFFFF	20.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00061C

Deuteranopia (green-blind)

#00041B

Tritanopia (blue-blind)

#00080D

Achromatopsia (no color)

#050505

Design tokens & code

CSS

--color: #00031b;
/* rgb */ color: rgb(0, 3, 27);
/* oklch */ color: oklch(11.7% 0.059 262.9);

Tailwind

colors: {
  custom: {
    50: '#464857',
    500: '#00031b',
    950: '#000000',
  },
}

SCSS

$custom: #00031b;
$custom-light: #464857;
$custom-dark: #000000;

JSON

{
  "hex": "#00031b",
  "rgb": {
    "r": 0,
    "g": 3,
    "b": 27
  },
  "hsl": {
    "h": 233.333,
    "s": 100,
    "l": 5.294
  },
  "oklch": {
    "l": 0.1171,
    "c": 0.05852,
    "h": 262.9
  },
  "luminance": 0.00144
}

Semantic roles & 50–950 ramp

primary

#00031B

secondary

#655C12

accent

#E729FF

background

#F3F4F5

surface

#E5E6E9

border

#C1C2C5

text

#000003

muted

#767778

Preview Lab

Preview with #00031B

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

Preview Lab → · Contrast checker → · Palette generator →