#183E89#183E89

#183E89 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.5% C 0.133 H 262.0°. Best body text is #FFFFFF at 10.05:1 contrast (WCAG AA passes).

Color values

HEX	#183E89
RGB	rgb(24, 62, 137)
HSL	hsl(220, 70%, 32%)
HSV	hsv(220, 82%, 54%)
CMYK	cmyk(82.5%, 54.7%, 0%, 46.3%)
CIE-LAB	lab(27.97, 16.14, -45.62)
CIE-LCH	lch(27.97, 48.39, 289.48°)
OKLab	oklab(38.46% -0.0184 -0.1315)
OKLCH	oklch(38.46% 0.133 262)
XYZ	xyz(6.6130, 5.4448, 24.3645)
Luminance	0.0545 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E89 #896318

analogous

#187789 #183E89 #2B1889

triadic

#183E89 #89183E #3E8918

tetradic

#183E89 #891877 #896318 #18892B

square

#183E89 #891877 #896318 #18892B

split-complementary

#183E89 #892B18 #778918

monochromatic

#060F21 #0F2655 #183E89 #2156BD #3E74DD

Accessibility & contrast

On white

10.05

#183E89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#183E89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E89

10.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E89	#FFFFFF	#000000	##FFFFFF
##183E89	1.00	10.05	2.09	10.05
#FFFFFF	10.05	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03478C

Deuteranopia (green-blind)

#003D88

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #183e89;
/* rgb */ color: rgb(24, 62, 137);
/* oklch */ color: oklch(38.5% 0.133 262.0);

Tailwind

colors: {
  custom: {
    50: '#6972ac',
    500: '#183e89',
    950: '#000000',
  },
}

SCSS

$custom: #183e89;
$custom-light: #6972ac;
$custom-dark: #000000;

JSON

{
  "hex": "#183e89",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 137
  },
  "hsl": {
    "h": 219.823,
    "s": 70.186,
    "l": 31.569
  },
  "oklch": {
    "l": 0.38458,
    "c": 0.13281,
    "h": 262
  },
  "luminance": 0.05446
}

Semantic roles & 50–950 ramp

primary

#183E89

secondary

#BD9340

accent

#B13BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #183E89

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

Preview Lab → · Contrast checker → · Palette generator →