#031738#031738

#031738 is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.2% C 0.070 H 258.8°. Best body text is #FFFFFF at 17.74:1 contrast (WCAG AA passes).

Color values

HEX	#031738
RGB	rgb(3, 23, 56)
HSL	hsl(217, 90%, 12%)
HSV	hsv(217, 95%, 22%)
CMYK	cmyk(94.6%, 58.9%, 0%, 78%)
CIE-LAB	lab(8.28, 6.95, -23.84)
CIE-LCH	lch(8.28, 24.83, 286.25°)
OKLab	oklab(21.16% -0.0136 -0.0687)
OKLCH	oklch(21.16% 0.07 258.8)
XYZ	xyz(1.0575, 0.9175, 3.8620)
Luminance	0.0092 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#031738 #382403

analogous

#033238 #031738 #090338

triadic

#031738 #380317 #173803

tetradic

#031738 #380332 #382403 #033809

square

#031738 #380332 #382403 #033809

split-complementary

#031738 #380903 #323803

monochromatic

#020C1D #020C1D #031738 #062F72 #0947AC

Accessibility & contrast

On white

17.74

#031738 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#031738 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #031738

17.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##031738	#FFFFFF	#000000	##FFFFFF
##031738	1.00	17.74	1.18	17.74
#FFFFFF	17.74	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031B39

Deuteranopia (green-blind)

#001637

Tritanopia (blue-blind)

#001F24

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #031738;
/* rgb */ color: rgb(3, 23, 56);
/* oklch */ color: oklch(21.2% 0.070 258.8);

Tailwind

colors: {
  custom: {
    50: '#4d536f',
    500: '#031738',
    950: '#000000',
  },
}

SCSS

$custom: #031738;
$custom-light: #4d536f;
$custom-dark: #000000;

JSON

{
  "hex": "#031738",
  "rgb": {
    "r": 3,
    "g": 23,
    "b": 56
  },
  "hsl": {
    "h": 217.358,
    "s": 89.831,
    "l": 11.569
  },
  "oklch": {
    "l": 0.21156,
    "c": 0.07004,
    "h": 258.8
  },
  "luminance": 0.00918
}

Semantic roles & 50–950 ramp

primary

#031738

secondary

#7B571C

accent

#AE29FF

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020207

muted

#78787A

Preview Lab

Preview with #031738

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

Preview Lab → · Contrast checker → · Palette generator →