#183971#183971

#183971 is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.4% C 0.104 H 260.3°. Best body text is #FFFFFF at 11.27:1 contrast (WCAG AA passes).

Color values

HEX	#183971
RGB	rgb(24, 57, 113)
HSL	hsl(218, 65%, 27%)
HSV	hsv(218, 79%, 44%)
CMYK	cmyk(78.8%, 49.6%, 0%, 55.7%)
CIE-LAB	lab(24.68, 9.73, -35.84)
CIE-LCH	lch(24.68, 37.14, 285.19°)
OKLab	oklab(35.38% -0.0176 -0.1029)
OKLCH	oklch(35.38% 0.104 260.3)
XYZ	xyz(4.8194, 4.3122, 16.1979)
Luminance	0.0431 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183971 #715018

analogous

#186671 #183971 #241871

triadic

#183971 #711839 #397118

tetradic

#183971 #711866 #715018 #187124

square

#183971 #711866 #715018 #187124

split-complementary

#183971 #712418 #667118

monochromatic

#050D19 #0D203F #183971 #2352A3 #306DD3

Accessibility & contrast

On white

11.27

#183971 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#183971 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183971

11.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183971	#FFFFFF	#000000	##FFFFFF
##183971	1.00	11.27	1.86	11.27
#FFFFFF	11.27	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A3F73

Deuteranopia (green-blind)

#033770

Tritanopia (blue-blind)

#00464F

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183971;
/* rgb */ color: rgb(24, 57, 113);
/* oklch */ color: oklch(35.4% 0.104 260.3);

Tailwind

colors: {
  custom: {
    50: '#636e9a',
    500: '#183971',
    950: '#000000',
  },
}

SCSS

$custom: #183971;
$custom-light: #636e9a;
$custom-dark: #000000;

JSON

{
  "hex": "#183971",
  "rgb": {
    "r": 24,
    "g": 57,
    "b": 113
  },
  "hsl": {
    "h": 217.753,
    "s": 64.964,
    "l": 26.863
  },
  "oklch": {
    "l": 0.35379,
    "c": 0.10435,
    "h": 260.3
  },
  "luminance": 0.04313
}

Semantic roles & 50–950 ramp

primary

#183971

secondary

#A6803E

accent

#AA40E8

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183971

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

Preview Lab → · Contrast checker → · Palette generator →