#373AB7#373AB7

#373AB7 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.4% C 0.192 H 273.9°. Best body text is #FFFFFF at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#373AB7
RGB	rgb(55, 58, 183)
HSL	hsl(239, 54%, 47%)
HSV	hsv(239, 70%, 72%)
CMYK	cmyk(69.9%, 68.3%, 0%, 28.2%)
CIE-LAB	lab(32.38, 39.70, -66.19)
CIE-LCH	lch(32.38, 77.19, 300.96°)
OKLab	oklab(43.36% 0.0132 -0.1913)
OKLCH	oklch(43.36% 0.192 273.9)
XYZ	xyz(11.6330, 7.2561, 45.5781)
Luminance	0.0726 (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

#373AB7 #B7B437

analogous

#377AB7 #373AB7 #7437B7

triadic

#373AB7 #B7373A #3AB737

tetradic

#373AB7 #B7377A #B7B437 #37B774

square

#373AB7 #B7377A #B7B437 #37B774

split-complementary

#373AB7 #B77437 #7AB737

monochromatic

#1B1C59 #292B88 #373AB7 #5D60CE #8C8EDC

Accessibility & contrast

On white

8.57

#373AB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#373AB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373AB7

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373AB7	#FFFFFF	#000000	##FFFFFF
##373AB7	1.00	8.57	2.45	8.57
#FFFFFF	8.57	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BB

Deuteranopia (green-blind)

#0046B5

Tritanopia (blue-blind)

#005C74

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #373ab7;
/* rgb */ color: rgb(55, 58, 183);
/* oklch */ color: oklch(43.4% 0.192 273.9);

Tailwind

colors: {
  custom: {
    50: '#8071ce',
    500: '#373ab7',
    950: '#000000',
  },
}

SCSS

$custom: #373ab7;
$custom-light: #8071ce;
$custom-dark: #000000;

JSON

{
  "hex": "#373ab7",
  "rgb": {
    "r": 55,
    "g": 58,
    "b": 183
  },
  "hsl": {
    "h": 238.594,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43355,
    "c": 0.19172,
    "h": 273.9
  },
  "luminance": 0.07257
}

Semantic roles & 50–950 ramp

primary

#373AB7

secondary

#C7C583

accent

#DA4BDD

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #373AB7

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

Preview Lab → · Contrast checker → · Palette generator →