#05183B#05183B

#05183B is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 21.8% C 0.072 H 260.7°. Best body text is #FFFFFF at 17.50:1 contrast (WCAG AA passes).

Color values

HEX	#05183B
RGB	rgb(5, 24, 59)
HSL	hsl(219, 84%, 13%)
HSV	hsv(219, 92%, 23%)
CMYK	cmyk(91.5%, 59.3%, 0%, 76.9%)
CIE-LAB	lab(9.00, 7.96, -24.83)
CIE-LCH	lch(9.00, 26.08, 287.77°)
OKLab	oklab(21.82% -0.0117 -0.0715)
OKLCH	oklch(21.82% 0.072 260.7)
XYZ	xyz(1.1784, 1.0012, 4.2680)
Luminance	0.0100 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#05183B #3B2805

analogous

#05333B #05183B #0D053B

triadic

#05183B #3B0518 #183B05

tetradic

#05183B #3B0533 #3B2805 #053B0D

square

#05183B #3B0533 #3B2805 #053B0D

split-complementary

#05183B #3B0D05 #333B05

monochromatic

#020B1C #020B1C #05183B #0A2F73 #0F46AC

Accessibility & contrast

On white

17.50

#05183B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#05183B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #05183B

17.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##05183B	#FFFFFF	#000000	##FFFFFF
##05183B	1.00	17.50	1.20	17.50
#FFFFFF	17.50	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031C3C

Deuteranopia (green-blind)

#00173A

Tritanopia (blue-blind)

#002126

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #05183b;
/* rgb */ color: rgb(5, 24, 59);
/* oklch */ color: oklch(21.8% 0.072 260.7);

Tailwind

colors: {
  custom: {
    50: '#4f5471',
    500: '#05183b',
    950: '#000000',
  },
}

SCSS

$custom: #05183b;
$custom-light: #4f5471;
$custom-dark: #000000;

JSON

{
  "hex": "#05183b",
  "rgb": {
    "r": 5,
    "g": 24,
    "b": 59
  },
  "hsl": {
    "h": 218.889,
    "s": 84.375,
    "l": 12.549
  },
  "oklch": {
    "l": 0.21818,
    "c": 0.07249,
    "h": 260.7
  },
  "luminance": 0.01001
}

Semantic roles & 50–950 ramp

primary

#05183B

secondary

#7C5C20

accent

#B22DFB

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020207

muted

#78787A

Preview Lab

Preview with #05183B

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

Preview Lab → · Contrast checker → · Palette generator →