#373DB6#373DB6

#373DB6 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.8% C 0.187 H 273.5°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#373DB6
RGB	rgb(55, 61, 182)
HSL	hsl(237, 54%, 46%)
HSV	hsv(237, 70%, 71%)
CMYK	cmyk(69.8%, 66.5%, 0%, 28.6%)
CIE-LAB	lab(32.98, 37.52, -64.63)
CIE-LCH	lch(32.98, 74.73, 300.14°)
OKLab	oklab(43.76% 0.0113 -0.1867)
OKLCH	oklch(43.76% 0.187 273.5)
XYZ	xyz(11.6850, 7.5260, 45.0838)
Luminance	0.0753 (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

#373DB6 #B6B037

analogous

#377DB6 #373DB6 #7137B6

triadic

#373DB6 #B6373D #3DB637

tetradic

#373DB6 #B6377D #B6B037 #37B671

square

#373DB6 #B6377D #B6B037 #37B671

split-complementary

#373DB6 #B67137 #7DB637

monochromatic

#1B1D58 #292D87 #373DB6 #5C62CE #8B8FDC

Accessibility & contrast

On white

8.38

#373DB6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#373DB6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DB6

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DB6	#FFFFFF	#000000	##FFFFFF
##373DB6	1.00	8.38	2.51	8.38
#FFFFFF	8.38	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BA

Deuteranopia (green-blind)

#0048B4

Tritanopia (blue-blind)

#005D74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373db6;
/* rgb */ color: rgb(55, 61, 182);
/* oklch */ color: oklch(43.8% 0.187 273.5);

Tailwind

colors: {
  custom: {
    50: '#7f73cd',
    500: '#373db6',
    950: '#000000',
  },
}

SCSS

$custom: #373db6;
$custom-light: #7f73cd;
$custom-dark: #000000;

JSON

{
  "hex": "#373db6",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 182
  },
  "hsl": {
    "h": 237.165,
    "s": 53.586,
    "l": 46.471
  },
  "oklch": {
    "l": 0.43757,
    "c": 0.18703,
    "h": 273.5
  },
  "luminance": 0.07527
}

Semantic roles & 50–950 ramp

primary

#373DB6

secondary

#C6C382

accent

#D64BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #373DB6

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

Preview Lab → · Contrast checker → · Palette generator →