#03173F#03173F

#03173F is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 21.8% C 0.081 H 261.1°. Best body text is #FFFFFF at 17.53:1 contrast (WCAG AA passes).

Color values

HEX	#03173F
RGB	rgb(3, 23, 63)
HSL	hsl(220, 91%, 13%)
HSV	hsv(220, 95%, 25%)
CMYK	cmyk(95.2%, 63.5%, 0%, 75.3%)
CIE-LAB	lab(8.92, 10.34, -27.83)
CIE-LCH	lch(8.92, 29.69, 290.38°)
OKLab	oklab(21.83% -0.0126 -0.0804)
OKLCH	oklch(21.83% 0.081 261.1)
XYZ	xyz(1.2408, 0.9909, 4.8275)
Luminance	0.0099 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#03173F #3F2B03

analogous

#03353F #03173F #0D033F

triadic

#03173F #3F0317 #173F03

tetradic

#03173F #3F0335 #3F2B03 #033F0D

square

#03173F #3F0335 #3F2B03 #033F0D

split-complementary

#03173F #3F0D03 #353F03

monochromatic

#010B1D #010B1D #03173F #062C79 #0942B4

Accessibility & contrast

On white

17.53

#03173F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#03173F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #03173F

17.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##03173F	#FFFFFF	#000000	##FFFFFF
##03173F	1.00	17.53	1.20	17.53
#FFFFFF	17.53	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001C40

Deuteranopia (green-blind)

#00173E

Tritanopia (blue-blind)

#002128

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #03173f;
/* rgb */ color: rgb(3, 23, 63);
/* oklch */ color: oklch(21.8% 0.081 261.1);

Tailwind

colors: {
  custom: {
    50: '#505374',
    500: '#03173f',
    950: '#000000',
  },
}

SCSS

$custom: #03173f;
$custom-light: #505374;
$custom-dark: #000000;

JSON

{
  "hex": "#03173f",
  "rgb": {
    "r": 3,
    "g": 23,
    "b": 63
  },
  "hsl": {
    "h": 220,
    "s": 90.909,
    "l": 12.941
  },
  "oklch": {
    "l": 0.21835,
    "c": 0.08142,
    "h": 261.1
  },
  "luminance": 0.00991
}

Semantic roles & 50–950 ramp

primary

#03173F

secondary

#81601D

accent

#B829FF

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#020208

muted

#78787B

Preview Lab

Preview with #03173F

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

Preview Lab → · Contrast checker → · Palette generator →