#03183A#03183A

#03183A is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 21.6% C 0.072 H 258.7°. Best body text is #FFFFFF at 17.56:1 contrast (WCAG AA passes).

Color values

HEX	#03183A
RGB	rgb(3, 24, 58)
HSL	hsl(217, 90%, 12%)
HSV	hsv(217, 95%, 23%)
CMYK	cmyk(94.8%, 58.6%, 0%, 77.3%)
CIE-LAB	lab(8.81, 7.11, -24.44)
CIE-LCH	lch(8.81, 25.45, 286.22°)
OKLab	oklab(21.61% -0.0141 -0.0704)
OKLCH	oklch(21.61% 0.072 258.7)
XYZ	xyz(1.1276, 0.9780, 4.1315)
Luminance	0.0098 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#03183A #3A2503

analogous

#03343A #03183A #0A033A

triadic

#03183A #3A0318 #183A03

tetradic

#03183A #3A0334 #3A2503 #033A0A

square

#03183A #3A0334 #3A2503 #033A0A

split-complementary

#03183A #3A0A03 #343A03

monochromatic

#020C1D #020C1D #03183A #063074 #0948AE

Accessibility & contrast

On white

17.56

#03183A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#03183A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #03183A

17.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##03183A	#FFFFFF	#000000	##FFFFFF
##03183A	1.00	17.56	1.20	17.56
#FFFFFF	17.56	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#041C3B

Deuteranopia (green-blind)

#001739

Tritanopia (blue-blind)

#002026

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #03183a;
/* rgb */ color: rgb(3, 24, 58);
/* oklch */ color: oklch(21.6% 0.072 258.7);

Tailwind

colors: {
  custom: {
    50: '#4e5470',
    500: '#03183a',
    950: '#000000',
  },
}

SCSS

$custom: #03183a;
$custom-light: #4e5470;
$custom-dark: #000000;

JSON

{
  "hex": "#03183a",
  "rgb": {
    "r": 3,
    "g": 24,
    "b": 58
  },
  "hsl": {
    "h": 217.091,
    "s": 90.164,
    "l": 11.961
  },
  "oklch": {
    "l": 0.21611,
    "c": 0.07182,
    "h": 258.7
  },
  "luminance": 0.00978
}

Semantic roles & 50–950 ramp

primary

#03183A

secondary

#7D581C

accent

#AD29FF

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020207

muted

#78787A

Preview Lab

Preview with #03183A

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

Preview Lab → · Contrast checker → · Palette generator →