#373AB8#373AB8

#373AB8 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.5% C 0.193 H 273.9°. Best body text is #FFFFFF at 8.54:1 contrast (WCAG AA passes).

Color values

HEX	#373AB8
RGB	rgb(55, 58, 184)
HSL	hsl(239, 54%, 47%)
HSV	hsv(239, 70%, 72%)
CMYK	cmyk(70.1%, 68.5%, 0%, 27.8%)
CIE-LAB	lab(32.48, 40.04, -66.63)
CIE-LCH	lch(32.48, 77.74, 301.00°)
OKLab	oklab(43.45% 0.013 -0.1926)
OKLCH	oklch(43.45% 0.193 273.9)
XYZ	xyz(11.7375, 7.2979, 46.1282)
Luminance	0.0730 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373AB8 #B8B537

analogous

#377AB8 #373AB8 #7537B8

triadic

#373AB8 #B8373A #3AB837

tetradic

#373AB8 #B8377A #B8B537 #37B875

square

#373AB8 #B8377A #B8B537 #37B875

split-complementary

#373AB8 #B87537 #7AB837

monochromatic

#1B1C5A #292B89 #373AB8 #5D60CF #8D8EDD

Accessibility & contrast

On white

8.54

#373AB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#373AB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373AB8

8.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373AB8	#FFFFFF	#000000	##FFFFFF
##373AB8	1.00	8.54	2.46	8.54
#FFFFFF	8.54	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BC

Deuteranopia (green-blind)

#0046B6

Tritanopia (blue-blind)

#005C74

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #373ab8;
/* rgb */ color: rgb(55, 58, 184);
/* oklch */ color: oklch(43.5% 0.193 273.9);

Tailwind

colors: {
  custom: {
    50: '#8071ce',
    500: '#373ab8',
    950: '#000000',
  },
}

SCSS

$custom: #373ab8;
$custom-light: #8071ce;
$custom-dark: #000000;

JSON

{
  "hex": "#373ab8",
  "rgb": {
    "r": 55,
    "g": 58,
    "b": 184
  },
  "hsl": {
    "h": 238.605,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43451,
    "c": 0.193,
    "h": 273.9
  },
  "luminance": 0.07299
}

Semantic roles & 50–950 ramp

primary

#373AB8

secondary

#C7C684

accent

#DA4ADD

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #373AB8

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

Preview Lab → · Contrast checker → · Palette generator →