#031739#031739

#031739 is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.3% C 0.072 H 259.2°. Best body text is #FFFFFF at 17.71:1 contrast (WCAG AA passes).

Color values

HEX	#031739
RGB	rgb(3, 23, 57)
HSL	hsl(218, 90%, 12%)
HSV	hsv(218, 95%, 22%)
CMYK	cmyk(94.7%, 59.6%, 0%, 77.6%)
CIE-LAB	lab(8.37, 7.44, -24.42)
CIE-LCH	lch(8.37, 25.53, 286.93°)
OKLab	oklab(21.25% -0.0134 -0.0704)
OKLCH	oklch(21.25% 0.072 259.2)
XYZ	xyz(1.0822, 0.9274, 3.9921)
Luminance	0.0093 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#031739 #392503

analogous

#033239 #031739 #0A0339

triadic

#031739 #390317 #173903

tetradic

#031739 #390332 #392503 #03390A

square

#031739 #390332 #392503 #03390A

split-complementary

#031739 #390A03 #323903

monochromatic

#020C1D #020C1D #031739 #062E73 #0946AD

Accessibility & contrast

On white

17.71

#031739 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#031739 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #031739

17.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##031739	#FFFFFF	#000000	##FFFFFF
##031739	1.00	17.71	1.19	17.71
#FFFFFF	17.71	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031B3A

Deuteranopia (green-blind)

#001638

Tritanopia (blue-blind)

#001F25

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #031739;
/* rgb */ color: rgb(3, 23, 57);
/* oklch */ color: oklch(21.3% 0.072 259.2);

Tailwind

colors: {
  custom: {
    50: '#4e5370',
    500: '#031739',
    950: '#000000',
  },
}

SCSS

$custom: #031739;
$custom-light: #4e5370;
$custom-dark: #000000;

JSON

{
  "hex": "#031739",
  "rgb": {
    "r": 3,
    "g": 23,
    "b": 57
  },
  "hsl": {
    "h": 217.778,
    "s": 90,
    "l": 11.765
  },
  "oklch": {
    "l": 0.2125,
    "c": 0.07168,
    "h": 259.2
  },
  "luminance": 0.00928
}

Semantic roles & 50–950 ramp

primary

#031739

secondary

#7C581C

accent

#B029FF

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020207

muted

#78787A

Preview Lab

Preview with #031739

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

Preview Lab → · Contrast checker → · Palette generator →