#03173A#03173A

#03173A is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.3% C 0.073 H 259.6°. Best body text is #FFFFFF at 17.68:1 contrast (WCAG AA passes).

Color values

HEX	#03173A
RGB	rgb(3, 23, 58)
HSL	hsl(218, 90%, 12%)
HSV	hsv(218, 95%, 23%)
CMYK	cmyk(94.8%, 60.3%, 0%, 77.3%)
CIE-LAB	lab(8.46, 7.92, -25.00)
CIE-LCH	lch(8.46, 26.22, 287.58°)
OKLab	oklab(21.35% -0.0133 -0.0721)
OKLCH	oklch(21.35% 0.073 259.6)
XYZ	xyz(1.1074, 0.9375, 4.1248)
Luminance	0.0094 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#03173A #3A2603

analogous

#03333A #03173A #0B033A

triadic

#03173A #3A0317 #173A03

tetradic

#03173A #3A0333 #3A2603 #033A0B

square

#03173A #3A0333 #3A2603 #033A0B

split-complementary

#03173A #3A0B03 #333A03

monochromatic

#020C1D #020C1D #03173A #062E74 #0945AE

Accessibility & contrast

On white

17.68

#03173A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#03173A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #03173A

17.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##03173A	#FFFFFF	#000000	##FFFFFF
##03173A	1.00	17.68	1.19	17.68
#FFFFFF	17.68	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#021B3B

Deuteranopia (green-blind)

#001639

Tritanopia (blue-blind)

#002025

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #03173a;
/* rgb */ color: rgb(3, 23, 58);
/* oklch */ color: oklch(21.3% 0.073 259.6);

Tailwind

colors: {
  custom: {
    50: '#4e5370',
    500: '#03173a',
    950: '#000000',
  },
}

SCSS

$custom: #03173a;
$custom-light: #4e5370;
$custom-dark: #000000;

JSON

{
  "hex": "#03173a",
  "rgb": {
    "r": 3,
    "g": 23,
    "b": 58
  },
  "hsl": {
    "h": 218.182,
    "s": 90.164,
    "l": 11.961
  },
  "oklch": {
    "l": 0.21345,
    "c": 0.07331,
    "h": 259.6
  },
  "luminance": 0.00938
}

Semantic roles & 50–950 ramp

primary

#03173A

secondary

#7D5A1C

accent

#B129FF

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020207

muted

#78787A

Preview Lab

Preview with #03173A

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

Preview Lab → · Contrast checker → · Palette generator →