#183158#183158

#183158 is a dark, moderate blue. Relative luminance 0.031; OKLCH L 31.5% C 0.077 H 259.0°. Best body text is #FFFFFF at 12.97:1 contrast (WCAG AA passes).

Color values

HEX	#183158
RGB	rgb(24, 49, 88)
HSL	hsl(217, 57%, 22%)
HSV	hsv(217, 73%, 35%)
CMYK	cmyk(72.7%, 44.3%, 0%, 65.5%)
CIE-LAB	lab(20.42, 5.06, -26.40)
CIE-LCH	lch(20.42, 26.88, 280.86°)
OKLab	oklab(31.55% -0.0146 -0.0753)
OKLCH	oklch(31.55% 0.077 259)
XYZ	xyz(3.2358, 3.0951, 9.6575)
Luminance	0.0309 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183158 #583F18

analogous

#185158 #183158 #1F1858

triadic

#183158 #581831 #315818

tetradic

#183158 #581851 #583F18 #18581F

square

#183158 #581851 #583F18 #18581F

split-complementary

#183158 #581F18 #515818

monochromatic

#070D18 #0B1628 #183158 #254C88 #3267B8

Accessibility & contrast

On white

12.97

#183158 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#183158 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183158

12.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183158	#FFFFFF	#000000	##FFFFFF
##183158	1.00	12.97	1.62	12.97
#FFFFFF	12.97	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F345A

Deuteranopia (green-blind)

#152E57

Tritanopia (blue-blind)

#003A40

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #183158;
/* rgb */ color: rgb(24, 49, 88);
/* oklch */ color: oklch(31.5% 0.077 259.0);

Tailwind

colors: {
  custom: {
    50: '#5d6887',
    500: '#183158',
    950: '#000000',
  },
}

SCSS

$custom: #183158;
$custom-light: #5d6887;
$custom-dark: #000000;

JSON

{
  "hex": "#183158",
  "rgb": {
    "r": 24,
    "g": 49,
    "b": 88
  },
  "hsl": {
    "h": 216.563,
    "s": 57.143,
    "l": 21.961
  },
  "oklch": {
    "l": 0.31545,
    "c": 0.07668,
    "h": 259
  },
  "luminance": 0.03095
}

Semantic roles & 50–950 ramp

primary

#183158

secondary

#8F6F3D

accent

#A547E0

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05060B

muted

#797A7C

Preview Lab

Preview with #183158

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

Preview Lab → · Contrast checker → · Palette generator →