#181F8E#181F8E

#181F8E is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.1% C 0.176 H 269.3°. Best body text is #FFFFFF at 12.92:1 contrast (WCAG AA passes).

Color values

HEX	#181F8E
RGB	rgb(24, 31, 142)
HSL	hsl(236, 71%, 33%)
HSV	hsv(236, 83%, 56%)
CMYK	cmyk(83.1%, 78.2%, 0%, 44.3%)
CIE-LAB	lab(20.54, 38.74, -60.89)
CIE-LCH	lch(20.54, 72.17, 302.46°)
OKLab	oklab(33.14% -0.002 -0.1764)
OKLCH	oklch(33.14% 0.176 269.3)
XYZ	xyz(5.7475, 3.1265, 25.8865)
Luminance	0.0313 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F8E #8E8718

analogous

#185A8E #181F8E #4C188E

triadic

#181F8E #8E181F #1F8E18

tetradic

#181F8E #8E185A #8E8718 #188E4C

square

#181F8E #8E185A #8E8718 #188E4C

split-complementary

#181F8E #8E4C18 #5A8E18

monochromatic

#060825 #0F145A #181F8E #212AC2 #414BDF

Accessibility & contrast

On white

12.92

#181F8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#181F8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F8E

12.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F8E	#FFFFFF	#000000	##FFFFFF
##181F8E	1.00	12.92	1.63	12.92
#FFFFFF	12.92	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003791

Deuteranopia (green-blind)

#002B8C

Tritanopia (blue-blind)

#004055

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #181f8e;
/* rgb */ color: rgb(24, 31, 142);
/* oklch */ color: oklch(33.1% 0.176 269.3);

Tailwind

colors: {
  custom: {
    50: '#6d5cb0',
    500: '#181f8e',
    950: '#000000',
  },
}

SCSS

$custom: #181f8e;
$custom-light: #6d5cb0;
$custom-dark: #000000;

JSON

{
  "hex": "#181f8e",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 142
  },
  "hsl": {
    "h": 236.441,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.3314,
    "c": 0.17642,
    "h": 269.3
  },
  "luminance": 0.03127
}

Semantic roles & 50–950 ramp

primary

#181F8E

secondary

#C0B842

accent

#E33AEE

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#080411

muted

#7B7980

Preview Lab

Preview with #181F8E

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

Preview Lab → · Contrast checker → · Palette generator →