#183871#183871

#183871 is a dark, moderate blue. Relative luminance 0.042; OKLCH L 35.1% C 0.106 H 260.9°. Best body text is #FFFFFF at 11.39:1 contrast (WCAG AA passes).

Color values

HEX	#183871
RGB	rgb(24, 56, 113)
HSL	hsl(218, 65%, 27%)
HSV	hsv(218, 79%, 44%)
CMYK	cmyk(78.8%, 50.4%, 0%, 55.7%)
CIE-LAB	lab(24.37, 10.44, -36.34)
CIE-LCH	lch(24.37, 37.81, 286.02°)
OKLab	oklab(35.14% -0.0167 -0.1043)
OKLCH	oklch(35.14% 0.106 260.9)
XYZ	xyz(4.7704, 4.2143, 16.1816)
Luminance	0.0421 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183871 #715118

analogous

#186571 #183871 #251871

triadic

#183871 #711838 #387118

tetradic

#183871 #711865 #715118 #187125

square

#183871 #711865 #715118 #187125

split-complementary

#183871 #712518 #657118

monochromatic

#050D19 #0D1F3F #183871 #2351A3 #306BD3

Accessibility & contrast

On white

11.39

#183871 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#183871 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183871

11.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183871	#FFFFFF	#000000	##FFFFFF
##183871	1.00	11.39	1.84	11.39
#FFFFFF	11.39	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#183E73

Deuteranopia (green-blind)

#003670

Tritanopia (blue-blind)

#00464F

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183871;
/* rgb */ color: rgb(24, 56, 113);
/* oklch */ color: oklch(35.1% 0.106 260.9);

Tailwind

colors: {
  custom: {
    50: '#636e9a',
    500: '#183871',
    950: '#000000',
  },
}

SCSS

$custom: #183871;
$custom-light: #636e9a;
$custom-dark: #000000;

JSON

{
  "hex": "#183871",
  "rgb": {
    "r": 24,
    "g": 56,
    "b": 113
  },
  "hsl": {
    "h": 218.427,
    "s": 64.964,
    "l": 26.863
  },
  "oklch": {
    "l": 0.3514,
    "c": 0.10568,
    "h": 260.9
  },
  "luminance": 0.04215
}

Semantic roles & 50–950 ramp

primary

#183871

secondary

#A6813E

accent

#AC40E8

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183871

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

Preview Lab → · Contrast checker → · Palette generator →