#183257#183257

#183257 is a dark, moderate blue. Relative luminance 0.032; OKLCH L 31.7% C 0.074 H 257.5°. Best body text is #FFFFFF at 12.86:1 contrast (WCAG AA passes).

Color values

HEX	#183257
RGB	rgb(24, 50, 87)
HSL	hsl(215, 57%, 22%)
HSV	hsv(215, 72%, 34%)
CMYK	cmyk(72.4%, 42.5%, 0%, 65.9%)
CIE-LAB	lab(20.69, 3.94, -25.31)
CIE-LCH	lch(20.69, 25.62, 278.85°)
OKLab	oklab(31.73% -0.016 -0.0721)
OKLCH	oklch(31.73% 0.074 257.5)
XYZ	xyz(3.2370, 3.1632, 9.4549)
Luminance	0.0316 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183257 #573D18

analogous

#185257 #183257 #1E1857

triadic

#183257 #571832 #325718

tetradic

#183257 #571852 #573D18 #18571E

square

#183257 #571852 #573D18 #18571E

split-complementary

#183257 #571E18 #525718

monochromatic

#070E18 #0B1627 #183257 #254E87 #3269B7

Accessibility & contrast

On white

12.86

#183257 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#183257 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183257

12.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183257	#FFFFFF	#000000	##FFFFFF
##183257	1.00	12.86	1.63	12.86
#FFFFFF	12.86	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#213558

Deuteranopia (green-blind)

#182F56

Tritanopia (blue-blind)

#003B40

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #183257;
/* rgb */ color: rgb(24, 50, 87);
/* oklch */ color: oklch(31.7% 0.074 257.5);

Tailwind

colors: {
  custom: {
    50: '#5d6986',
    500: '#183257',
    950: '#000000',
  },
}

SCSS

$custom: #183257;
$custom-light: #5d6986;
$custom-dark: #000000;

JSON

{
  "hex": "#183257",
  "rgb": {
    "r": 24,
    "g": 50,
    "b": 87
  },
  "hsl": {
    "h": 215.238,
    "s": 56.757,
    "l": 21.765
  },
  "oklch": {
    "l": 0.3173,
    "c": 0.07383,
    "h": 257.5
  },
  "luminance": 0.03164
}

Semantic roles & 50–950 ramp

primary

#183257

secondary

#8E6C3D

accent

#A148E0

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05060B

muted

#797A7C

Preview Lab

Preview with #183257

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

Preview Lab → · Contrast checker → · Palette generator →