#181D8F#181D8F

#181D8F is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.0% C 0.180 H 269.5°. Best body text is #FFFFFF at 13.03:1 contrast (WCAG AA passes).

Color values

HEX	#181D8F
RGB	rgb(24, 29, 143)
HSL	hsl(237, 71%, 33%)
HSV	hsv(237, 83%, 56%)
CMYK	cmyk(83.2%, 79.7%, 0%, 43.9%)
CIE-LAB	lab(20.26, 40.22, -61.98)
CIE-LCH	lch(20.26, 73.89, 302.98°)
OKLab	oklab(32.98% -0.0016 -0.1795)
OKLCH	oklch(32.98% 0.18 269.5)
XYZ	xyz(5.7723, 3.0554, 26.2668)
Luminance	0.0306 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D8F #8F8A18

analogous

#18588F #181D8F #4E188F

triadic

#181D8F #8F181D #1D8F18

tetradic

#181D8F #8F1858 #8F8A18 #188F4E

square

#181D8F #8F1858 #8F8A18 #188F4E

split-complementary

#181D8F #8F4E18 #588F18

monochromatic

#060826 #0F125B #181D8F #2128C3 #4249DF

Accessibility & contrast

On white

13.03

#181D8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#181D8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D8F

13.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D8F	#FFFFFF	#000000	##FFFFFF
##181D8F	1.00	13.03	1.61	13.03
#FFFFFF	13.03	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003792

Deuteranopia (green-blind)

#002B8D

Tritanopia (blue-blind)

#004056

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #181d8f;
/* rgb */ color: rgb(24, 29, 143);
/* oklch */ color: oklch(33.0% 0.180 269.5);

Tailwind

colors: {
  custom: {
    50: '#6e5bb1',
    500: '#181d8f',
    950: '#000000',
  },
}

SCSS

$custom: #181d8f;
$custom-light: #6e5bb1;
$custom-dark: #000000;

JSON

{
  "hex": "#181d8f",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 143
  },
  "hsl": {
    "h": 237.479,
    "s": 71.257,
    "l": 32.745
  },
  "oklch": {
    "l": 0.32978,
    "c": 0.17954,
    "h": 269.5
  },
  "luminance": 0.03056
}

Semantic roles & 50–950 ramp

primary

#181D8F

secondary

#C0BB43

accent

#E63AEE

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #181D8F

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

Preview Lab → · Contrast checker → · Palette generator →