#183171#183171

#183171 is a dark, moderate blue. Relative luminance 0.036; OKLCH L 33.5% C 0.115 H 264.7°. Best body text is #FFFFFF at 12.23:1 contrast (WCAG AA passes).

Color values

HEX	#183171
RGB	rgb(24, 49, 113)
HSL	hsl(223, 65%, 27%)
HSV	hsv(223, 79%, 44%)
CMYK	cmyk(78.8%, 56.6%, 0%, 55.7%)
CIE-LAB	lab(22.24, 15.44, -39.78)
CIE-LCH	lch(22.24, 42.67, 291.22°)
OKLab	oklab(33.52% -0.0105 -0.1146)
OKLCH	oklch(33.52% 0.115 264.7)
XYZ	xyz(4.4546, 3.5826, 16.0763)
Luminance	0.0358 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183171 #715818

analogous

#185E71 #183171 #2C1871

triadic

#183171 #711831 #317118

tetradic

#183171 #71185E #715818 #18712C

square

#183171 #71185E #715818 #18712C

split-complementary

#183171 #712C18 #5E7118

monochromatic

#050B19 #0D1B3F #183171 #2347A3 #305ED3

Accessibility & contrast

On white

12.23

#183171 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#183171 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183171

12.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183171	#FFFFFF	#000000	##FFFFFF
##183171	1.00	12.23	1.72	12.23
#FFFFFF	12.23	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003973

Deuteranopia (green-blind)

#003170

Tritanopia (blue-blind)

#00414C

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #183171;
/* rgb */ color: rgb(24, 49, 113);
/* oklch */ color: oklch(33.5% 0.115 264.7);

Tailwind

colors: {
  custom: {
    50: '#63689a',
    500: '#183171',
    950: '#000000',
  },
}

SCSS

$custom: #183171;
$custom-light: #63689a;
$custom-dark: #000000;

JSON

{
  "hex": "#183171",
  "rgb": {
    "r": 24,
    "g": 49,
    "b": 113
  },
  "hsl": {
    "h": 223.146,
    "s": 64.964,
    "l": 26.863
  },
  "oklch": {
    "l": 0.3352,
    "c": 0.11509,
    "h": 264.7
  },
  "luminance": 0.03583
}

Semantic roles & 50–950 ramp

primary

#183171

secondary

#A6893E

accent

#B940E8

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #183171

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

Preview Lab → · Contrast checker → · Palette generator →