#031B3F#031B3F

#031B3F is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 22.9% C 0.075 H 258.0°. Best body text is #FFFFFF at 17.04:1 contrast (WCAG AA passes).

Color values

HEX	#031B3F
RGB	rgb(3, 27, 63)
HSL	hsl(216, 91%, 13%)
HSV	hsv(216, 95%, 25%)
CMYK	cmyk(95.2%, 57.1%, 0%, 75.3%)
CIE-LAB	lab(10.27, 7.13, -25.63)
CIE-LCH	lch(10.27, 26.60, 285.55°)
OKLab	oklab(22.87% -0.0157 -0.0738)
OKLCH	oklch(22.87% 0.075 258)
XYZ	xyz(1.3264, 1.1619, 4.8560)
Luminance	0.0116 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#031B3F #3F2703

analogous

#03393F #031B3F #09033F

triadic

#031B3F #3F031B #1B3F03

tetradic

#031B3F #3F0339 #3F2703 #033F09

square

#031B3F #3F0339 #3F2703 #033F09

split-complementary

#031B3F #3F0903 #393F03

monochromatic

#010D1D #010D1D #031B3F #063479 #094DB4

Accessibility & contrast

On white

17.04

#031B3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#031B3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #031B3F

17.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##031B3F	#FFFFFF	#000000	##FFFFFF
##031B3F	1.00	17.04	1.23	17.04
#FFFFFF	17.04	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#051F40

Deuteranopia (green-blind)

#00193E

Tritanopia (blue-blind)

#00242A

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #031b3f;
/* rgb */ color: rgb(3, 27, 63);
/* oklch */ color: oklch(22.9% 0.075 258.0);

Tailwind

colors: {
  custom: {
    50: '#4f5674',
    500: '#031b3f',
    950: '#000000',
  },
}

SCSS

$custom: #031b3f;
$custom-light: #4f5674;
$custom-dark: #000000;

JSON

{
  "hex": "#031b3f",
  "rgb": {
    "r": 3,
    "g": 27,
    "b": 63
  },
  "hsl": {
    "h": 216,
    "s": 90.909,
    "l": 12.941
  },
  "oklch": {
    "l": 0.22871,
    "c": 0.07549,
    "h": 258
  },
  "luminance": 0.01162
}

Semantic roles & 50–950 ramp

primary

#031B3F

secondary

#81591D

accent

#A929FF

background

#F4F5F7

surface

#E7E9ED

border

#C3C5C8

text

#020308

muted

#78787B

Preview Lab

Preview with #031B3F

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

Preview Lab → · Contrast checker → · Palette generator →