#183B80#183B80

#183B80 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.0% C 0.124 H 262.1°. Best body text is #FFFFFF at 10.63:1 contrast (WCAG AA passes).

Color values

HEX	#183B80
RGB	rgb(24, 59, 128)
HSL	hsl(220, 68%, 30%)
HSV	hsv(220, 81%, 50%)
CMYK	cmyk(81.3%, 53.9%, 0%, 49.8%)
CIE-LAB	lab(26.39, 14.53, -42.56)
CIE-LCH	lch(26.39, 44.98, 288.85°)
OKLab	oklab(37.04% -0.0171 -0.1226)
OKLCH	oklch(37.04% 0.124 262.1)
XYZ	xyz(5.8355, 4.8800, 21.0523)
Luminance	0.0488 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B80 #805D18

analogous

#186F80 #183B80 #291880

triadic

#183B80 #80183B #3B8018

tetradic

#183B80 #80186F #805D18 #188029

square

#183B80 #80186F #805D18 #188029

split-complementary

#183B80 #802918 #6F8018

monochromatic

#050C1A #0E234C #183B80 #2253B4 #396FDA

Accessibility & contrast

On white

10.63

#183B80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#183B80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B80

10.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B80	#FFFFFF	#000000	##FFFFFF
##183B80	1.00	10.63	1.98	10.63
#FFFFFF	10.63	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B4382

Deuteranopia (green-blind)

#003A7F

Tritanopia (blue-blind)

#004C57

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183b80;
/* rgb */ color: rgb(24, 59, 128);
/* oklch */ color: oklch(37.0% 0.124 262.1);

Tailwind

colors: {
  custom: {
    50: '#6770a5',
    500: '#183b80',
    950: '#000000',
  },
}

SCSS

$custom: #183b80;
$custom-light: #6770a5;
$custom-dark: #000000;

JSON

{
  "hex": "#183b80",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 128
  },
  "hsl": {
    "h": 219.808,
    "s": 68.421,
    "l": 29.804
  },
  "oklch": {
    "l": 0.3704,
    "c": 0.1238,
    "h": 262.1
  },
  "luminance": 0.04881
}

Semantic roles & 50–950 ramp

primary

#183B80

secondary

#B48D40

accent

#B03DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183B80

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

Preview Lab → · Contrast checker → · Palette generator →