#03183F#03183F

#03183F is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.1% C 0.080 H 260.4°. Best body text is #FFFFFF at 17.41:1 contrast (WCAG AA passes).

Color values

HEX	#03183F
RGB	rgb(3, 24, 63)
HSL	hsl(219, 91%, 13%)
HSV	hsv(219, 95%, 25%)
CMYK	cmyk(95.2%, 61.9%, 0%, 75.3%)
CIE-LAB	lab(9.25, 9.54, -27.29)
CIE-LCH	lch(9.25, 28.90, 289.26°)
OKLab	oklab(22.09% -0.0134 -0.0788)
OKLCH	oklch(22.09% 0.08 260.4)
XYZ	xyz(1.2611, 1.0313, 4.8343)
Luminance	0.0103 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#03183F #3F2A03

analogous

#03363F #03183F #0C033F

triadic

#03183F #3F0318 #183F03

tetradic

#03183F #3F0336 #3F2A03 #033F0C

square

#03183F #3F0336 #3F2A03 #033F0C

split-complementary

#03183F #3F0C03 #363F03

monochromatic

#010B1D #010B1D #03183F #062E79 #0945B4

Accessibility & contrast

On white

17.41

#03183F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#03183F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #03183F

17.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##03183F	#FFFFFF	#000000	##FFFFFF
##03183F	1.00	17.41	1.21	17.41
#FFFFFF	17.41	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D40

Deuteranopia (green-blind)

#00173E

Tritanopia (blue-blind)

#002228

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #03183f;
/* rgb */ color: rgb(3, 24, 63);
/* oklch */ color: oklch(22.1% 0.080 260.4);

Tailwind

colors: {
  custom: {
    50: '#505474',
    500: '#03183f',
    950: '#000000',
  },
}

SCSS

$custom: #03183f;
$custom-light: #505474;
$custom-dark: #000000;

JSON

{
  "hex": "#03183f",
  "rgb": {
    "r": 3,
    "g": 24,
    "b": 63
  },
  "hsl": {
    "h": 219,
    "s": 90.909,
    "l": 12.941
  },
  "oklch": {
    "l": 0.22089,
    "c": 0.07993,
    "h": 260.4
  },
  "luminance": 0.01032
}

Semantic roles & 50–950 ramp

primary

#03183F

secondary

#815E1D

accent

#B429FF

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#020208

muted

#78787B

Preview Lab

Preview with #03183F

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

Preview Lab → · Contrast checker → · Palette generator →