#373FB8#373FB8

#373FB8 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.3% C 0.187 H 273.0°. Best body text is #FFFFFF at 8.19:1 contrast (WCAG AA passes).

Color values

HEX	#373FB8
RGB	rgb(55, 63, 184)
HSL	hsl(236, 54%, 47%)
HSV	hsv(236, 70%, 72%)
CMYK	cmyk(70.1%, 65.8%, 0%, 27.8%)
CIE-LAB	lab(33.62, 36.97, -64.75)
CIE-LCH	lch(33.62, 74.56, 299.72°)
OKLab	oklab(44.28% 0.0097 -0.1871)
OKLCH	oklch(44.28% 0.187 273)
XYZ	xyz(12.0019, 7.8268, 46.2163)
Luminance	0.0783 (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

#373FB8 #B8B037

analogous

#3780B8 #373FB8 #7037B8

triadic

#373FB8 #B8373F #3FB837

tetradic

#373FB8 #B83780 #B8B037 #37B870

square

#373FB8 #B83780 #B8B037 #37B870

split-complementary

#373FB8 #B87037 #80B837

monochromatic

#1B1F5A #292F89 #373FB8 #5D65CF #8D92DD

Accessibility & contrast

On white

8.19

#373FB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#373FB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FB8

8.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FB8	#FFFFFF	#000000	##FFFFFF
##373FB8	1.00	8.19	2.57	8.19
#FFFFFF	8.19	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BC

Deuteranopia (green-blind)

#0049B6

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #373fb8;
/* rgb */ color: rgb(55, 63, 184);
/* oklch */ color: oklch(44.3% 0.187 273.0);

Tailwind

colors: {
  custom: {
    50: '#7f74ce',
    500: '#373fb8',
    950: '#000000',
  },
}

SCSS

$custom: #373fb8;
$custom-light: #7f74ce;
$custom-dark: #000000;

JSON

{
  "hex": "#373fb8",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 184
  },
  "hsl": {
    "h": 236.279,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.44281,
    "c": 0.18731,
    "h": 273
  },
  "luminance": 0.07828
}

Semantic roles & 50–950 ramp

primary

#373FB8

secondary

#C7C384

accent

#D44ADD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373FB8

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

Preview Lab → · Contrast checker → · Palette generator →