#183D80#183D80

#183D80 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.5% C 0.121 H 261.1°. Best body text is #FFFFFF at 10.41:1 contrast (WCAG AA passes).

Color values

HEX	#183D80
RGB	rgb(24, 61, 128)
HSL	hsl(219, 68%, 30%)
HSV	hsv(219, 81%, 50%)
CMYK	cmyk(81.3%, 52.3%, 0%, 49.8%)
CIE-LAB	lab(26.99, 13.13, -41.60)
CIE-LCH	lch(26.99, 43.62, 287.52°)
OKLab	oklab(37.5% -0.0187 -0.1197)
OKLCH	oklch(37.5% 0.121 261.1)
XYZ	xyz(5.9403, 5.0895, 21.0872)
Luminance	0.0509 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D80 #805B18

analogous

#187180 #183D80 #271880

triadic

#183D80 #80183D #3D8018

tetradic

#183D80 #801871 #805B18 #188027

square

#183D80 #801871 #805B18 #188027

split-complementary

#183D80 #802718 #718018

monochromatic

#050C1A #0E244C #183D80 #2256B4 #3972DA

Accessibility & contrast

On white

10.41

#183D80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#183D80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D80

10.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D80	#FFFFFF	#000000	##FFFFFF
##183D80	1.00	10.41	2.02	10.41
#FFFFFF	10.41	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#134582

Deuteranopia (green-blind)

#003B7F

Tritanopia (blue-blind)

#004D58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183d80;
/* rgb */ color: rgb(24, 61, 128);
/* oklch */ color: oklch(37.5% 0.121 261.1);

Tailwind

colors: {
  custom: {
    50: '#6771a5',
    500: '#183d80',
    950: '#000000',
  },
}

SCSS

$custom: #183d80;
$custom-light: #6771a5;
$custom-dark: #000000;

JSON

{
  "hex": "#183d80",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 128
  },
  "hsl": {
    "h": 218.654,
    "s": 68.421,
    "l": 29.804
  },
  "oklch": {
    "l": 0.37497,
    "c": 0.12118,
    "h": 261.1
  },
  "luminance": 0.0509
}

Semantic roles & 50–950 ramp

primary

#183D80

secondary

#B48B40

accent

#AD3DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183D80

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

Preview Lab → · Contrast checker → · Palette generator →