#04183F#04183F

#04183F is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.1% C 0.079 H 261.1°. Best body text is #FFFFFF at 17.39:1 contrast (WCAG AA passes).

Color values

HEX	#04183F
RGB	rgb(4, 24, 63)
HSL	hsl(220, 88%, 13%)
HSV	hsv(220, 94%, 25%)
CMYK	cmyk(93.7%, 61.9%, 0%, 75.3%)
CIE-LAB	lab(9.30, 9.70, -27.20)
CIE-LCH	lch(9.30, 28.87, 289.62°)
OKLab	oklab(22.14% -0.0123 -0.0785)
OKLCH	oklch(22.14% 0.079 261.1)
XYZ	xyz(1.2736, 1.0378, 4.8349)
Luminance	0.0104 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04183F #3F2B04

analogous

#04353F #04183F #0D043F

triadic

#04183F #3F0418 #183F04

tetradic

#04183F #3F0435 #3F2B04 #043F0D

square

#04183F #3F0435 #3F2B04 #043F0D

split-complementary

#04183F #3F0D04 #353F04

monochromatic

#020B1D #020B1D #04183F #082E79 #0B44B2

Accessibility & contrast

On white

17.39

#04183F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#04183F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04183F

17.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04183F	#FFFFFF	#000000	##FFFFFF
##04183F	1.00	17.39	1.21	17.39
#FFFFFF	17.39	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.39	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: #04183f;
/* rgb */ color: rgb(4, 24, 63);
/* oklch */ color: oklch(22.1% 0.079 261.1);

Tailwind

colors: {
  custom: {
    50: '#505474',
    500: '#04183f',
    950: '#000000',
  },
}

SCSS

$custom: #04183f;
$custom-light: #505474;
$custom-dark: #000000;

JSON

{
  "hex": "#04183f",
  "rgb": {
    "r": 4,
    "g": 24,
    "b": 63
  },
  "hsl": {
    "h": 219.661,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.22144,
    "c": 0.07947,
    "h": 261.1
  },
  "luminance": 0.01038
}

Semantic roles & 50–950 ramp

primary

#04183F

secondary

#805F1E

accent

#B62AFE

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#020208

muted

#78787B

Preview Lab

Preview with #04183F

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

Preview Lab → · Contrast checker → · Palette generator →