#183E8E#183E8E

#183E8E is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.9% C 0.140 H 262.6°. Best body text is #FFFFFF at 9.91:1 contrast (WCAG AA passes).

Color values

HEX	#183E8E
RGB	rgb(24, 62, 142)
HSL	hsl(221, 71%, 33%)
HSV	hsv(221, 83%, 56%)
CMYK	cmyk(83.1%, 56.3%, 0%, 44.3%)
CIE-LAB	lab(28.36, 18.19, -48.07)
CIE-LCH	lch(28.36, 51.40, 290.72°)
OKLab	oklab(38.88% -0.0179 -0.1388)
OKLCH	oklch(38.88% 0.14 262.6)
XYZ	xyz(6.9800, 5.5916, 26.2973)
Luminance	0.0559 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E8E #8E6818

analogous

#18798E #183E8E #2D188E

triadic

#183E8E #8E183E #3E8E18

tetradic

#183E8E #8E1879 #8E6818 #188E2D

square

#183E8E #8E1879 #8E6818 #188E2D

split-complementary

#183E8E #8E2D18 #798E18

monochromatic

#061025 #0F275A #183E8E #2155C2 #4174DF

Accessibility & contrast

On white

9.91

#183E8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#183E8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E8E

9.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E8E	#FFFFFF	#000000	##FFFFFF
##183E8E	1.00	9.91	2.12	9.91
#FFFFFF	9.91	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004991

Deuteranopia (green-blind)

#003E8C

Tritanopia (blue-blind)

#00525F

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #183e8e;
/* rgb */ color: rgb(24, 62, 142);
/* oklch */ color: oklch(38.9% 0.140 262.6);

Tailwind

colors: {
  custom: {
    50: '#6a72b0',
    500: '#183e8e',
    950: '#000000',
  },
}

SCSS

$custom: #183e8e;
$custom-light: #6a72b0;
$custom-dark: #000000;

JSON

{
  "hex": "#183e8e",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 142
  },
  "hsl": {
    "h": 220.678,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.38878,
    "c": 0.1399,
    "h": 262.6
  },
  "luminance": 0.05592
}

Semantic roles & 50–950 ramp

primary

#183E8E

secondary

#C09742

accent

#B43AEE

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #183E8E

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

Preview Lab → · Contrast checker → · Palette generator →