#183E8A#183E8A

#183E8A is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.5% C 0.134 H 262.2°. Best body text is #FFFFFF at 10.02:1 contrast (WCAG AA passes).

Color values

HEX	#183E8A
RGB	rgb(24, 62, 138)
HSL	hsl(220, 70%, 32%)
HSV	hsv(220, 83%, 54%)
CMYK	cmyk(82.6%, 55.1%, 0%, 45.9%)
CIE-LAB	lab(28.04, 16.55, -46.11)
CIE-LCH	lch(28.04, 48.99, 289.74°)
OKLab	oklab(38.54% -0.0183 -0.133)
OKLCH	oklch(38.54% 0.134 262.2)
XYZ	xyz(6.6851, 5.4736, 24.7440)
Luminance	0.0547 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E8A #8A6418

analogous

#18778A #183E8A #2B188A

triadic

#183E8A #8A183E #3E8A18

tetradic

#183E8A #8A1877 #8A6418 #188A2B

square

#183E8A #8A1877 #8A6418 #188A2B

split-complementary

#183E8A #8A2B18 #778A18

monochromatic

#060F22 #0F2756 #183E8A #2155BE #3F74DE

Accessibility & contrast

On white

10.02

#183E8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#183E8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E8A

10.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E8A	#FFFFFF	#000000	##FFFFFF
##183E8A	1.00	10.02	2.09	10.02
#FFFFFF	10.02	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488D

Deuteranopia (green-blind)

#003D89

Tritanopia (blue-blind)

#00515D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #183e8a;
/* rgb */ color: rgb(24, 62, 138);
/* oklch */ color: oklch(38.5% 0.134 262.2);

Tailwind

colors: {
  custom: {
    50: '#6972ad',
    500: '#183e8a',
    950: '#000000',
  },
}

SCSS

$custom: #183e8a;
$custom-light: #6972ad;
$custom-dark: #000000;

JSON

{
  "hex": "#183e8a",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 138
  },
  "hsl": {
    "h": 220,
    "s": 70.37,
    "l": 31.765
  },
  "oklch": {
    "l": 0.38541,
    "c": 0.13424,
    "h": 262.2
  },
  "luminance": 0.05474
}

Semantic roles & 50–950 ramp

primary

#183E8A

secondary

#BD9440

accent

#B23BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #183E8A

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

Preview Lab → · Contrast checker → · Palette generator →