#181F8D#181F8D

#181F8D is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.0% C 0.175 H 269.4°. Best body text is #FFFFFF at 12.97:1 contrast (WCAG AA passes).

Color values

HEX	#181F8D
RGB	rgb(24, 31, 141)
HSL	hsl(236, 71%, 32%)
HSV	hsv(236, 83%, 55%)
CMYK	cmyk(83%, 78%, 0%, 44.7%)
CIE-LAB	lab(20.43, 38.39, -60.46)
CIE-LCH	lch(20.43, 71.62, 302.41°)
OKLab	oklab(33.02% -0.0019 -0.1752)
OKLCH	oklch(33.02% 0.175 269.4)
XYZ	xyz(5.6727, 3.0966, 25.4929)
Luminance	0.0310 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F8D #8D8618

analogous

#185A8D #181F8D #4B188D

triadic

#181F8D #8D181F #1F8D18

tetradic

#181F8D #8D185A #8D8618 #188D4B

square

#181F8D #8D185A #8D8618 #188D4B

split-complementary

#181F8D #8D4B18 #5A8D18

monochromatic

#060824 #0F1459 #181F8D #212AC1 #414ADF

Accessibility & contrast

On white

12.97

#181F8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#181F8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F8D

12.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F8D	#FFFFFF	#000000	##FFFFFF
##181F8D	1.00	12.97	1.62	12.97
#FFFFFF	12.97	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003790

Deuteranopia (green-blind)

#002B8B

Tritanopia (blue-blind)

#004055

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #181f8d;
/* rgb */ color: rgb(24, 31, 141);
/* oklch */ color: oklch(33.0% 0.175 269.4);

Tailwind

colors: {
  custom: {
    50: '#6d5cb0',
    500: '#181f8d',
    950: '#000000',
  },
}

SCSS

$custom: #181f8d;
$custom-light: #6d5cb0;
$custom-dark: #000000;

JSON

{
  "hex": "#181f8d",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 141
  },
  "hsl": {
    "h": 236.41,
    "s": 70.909,
    "l": 32.353
  },
  "oklch": {
    "l": 0.33024,
    "c": 0.17518,
    "h": 269.4
  },
  "luminance": 0.03097
}

Semantic roles & 50–950 ramp

primary

#181F8D

secondary

#BFB842

accent

#E33AEE

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#080411

muted

#7B7980

Preview Lab

Preview with #181F8D

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

Preview Lab → · Contrast checker → · Palette generator →