#373FB7#373FB7

#373FB7 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.2% C 0.186 H 273.0°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#373FB7
RGB	rgb(55, 63, 183)
HSL	hsl(236, 54%, 47%)
HSV	hsv(236, 70%, 72%)
CMYK	cmyk(69.9%, 65.6%, 0%, 28.2%)
CIE-LAB	lab(33.53, 36.62, -64.31)
CIE-LCH	lch(33.53, 74.00, 299.66°)
OKLab	oklab(44.19% 0.0098 -0.1857)
OKLCH	oklch(44.19% 0.186 273)
XYZ	xyz(11.8974, 7.7850, 45.6662)
Luminance	0.0779 (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

#373FB7 #B7AF37

analogous

#377FB7 #373FB7 #6F37B7

triadic

#373FB7 #B7373F #3FB737

tetradic

#373FB7 #B7377F #B7AF37 #37B76F

square

#373FB7 #B7377F #B7AF37 #37B76F

split-complementary

#373FB7 #B76F37 #7FB737

monochromatic

#1B1F59 #292F88 #373FB7 #5D64CE #8C91DC

Accessibility & contrast

On white

8.21

#373FB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#373FB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FB7

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FB7	#FFFFFF	#000000	##FFFFFF
##373FB7	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BB

Deuteranopia (green-blind)

#0049B5

Tritanopia (blue-blind)

#005E75

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #373fb7;
/* rgb */ color: rgb(55, 63, 183);
/* oklch */ color: oklch(44.2% 0.186 273.0);

Tailwind

colors: {
  custom: {
    50: '#7f74ce',
    500: '#373fb7',
    950: '#000000',
  },
}

SCSS

$custom: #373fb7;
$custom-light: #7f74ce;
$custom-dark: #000000;

JSON

{
  "hex": "#373fb7",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 183
  },
  "hsl": {
    "h": 236.25,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.44189,
    "c": 0.18601,
    "h": 273
  },
  "luminance": 0.07786
}

Semantic roles & 50–950 ramp

primary

#373FB7

secondary

#C7C383

accent

#D44BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #373FB7

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

Preview Lab → · Contrast checker → · Palette generator →