#183D89#183D89

#183D89 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.2% C 0.134 H 262.4°. Best body text is #FFFFFF at 10.16:1 contrast (WCAG AA passes).

Color values

HEX	#183D89
RGB	rgb(24, 61, 137)
HSL	hsl(220, 70%, 32%)
HSV	hsv(220, 82%, 54%)
CMYK	cmyk(82.5%, 55.5%, 0%, 46.3%)
CIE-LAB	lab(27.67, 16.84, -46.09)
CIE-LCH	lch(27.67, 49.07, 290.07°)
OKLab	oklab(38.24% -0.0177 -0.133)
OKLCH	oklch(38.24% 0.134 262.4)
XYZ	xyz(6.5592, 5.3370, 24.3465)
Luminance	0.0534 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D89 #896418

analogous

#187689 #183D89 #2C1889

triadic

#183D89 #89183D #3D8918

tetradic

#183D89 #891876 #896418 #18892C

square

#183D89 #891876 #896418 #18892C

split-complementary

#183D89 #892C18 #768918

monochromatic

#060F21 #0F2655 #183D89 #2154BD #3E72DD

Accessibility & contrast

On white

10.16

#183D89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#183D89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D89

10.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D89	#FFFFFF	#000000	##FFFFFF
##183D89	1.00	10.16	2.07	10.16
#FFFFFF	10.16	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478C

Deuteranopia (green-blind)

#003C88

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183d89;
/* rgb */ color: rgb(24, 61, 137);
/* oklch */ color: oklch(38.2% 0.134 262.4);

Tailwind

colors: {
  custom: {
    50: '#6971ac',
    500: '#183d89',
    950: '#000000',
  },
}

SCSS

$custom: #183d89;
$custom-light: #6971ac;
$custom-dark: #000000;

JSON

{
  "hex": "#183d89",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 137
  },
  "hsl": {
    "h": 220.354,
    "s": 70.186,
    "l": 31.569
  },
  "oklch": {
    "l": 0.38236,
    "c": 0.13412,
    "h": 262.4
  },
  "luminance": 0.05338
}

Semantic roles & 50–950 ramp

primary

#183D89

secondary

#BD9440

accent

#B33BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183D89

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

Preview Lab → · Contrast checker → · Palette generator →