#373AB2#373AB2

#373AB2 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.9% C 0.185 H 274.2°. Best body text is #FFFFFF at 8.71:1 contrast (WCAG AA passes).

Color values

HEX	#373AB2
RGB	rgb(55, 58, 178)
HSL	hsl(239, 53%, 46%)
HSV	hsv(239, 69%, 70%)
CMYK	cmyk(69.1%, 67.4%, 0%, 30.2%)
CIE-LAB	lab(31.92, 37.99, -63.98)
CIE-LCH	lch(31.92, 74.40, 300.70°)
OKLab	oklab(42.88% 0.0137 -0.1848)
OKLCH	oklch(42.88% 0.185 274.2)
XYZ	xyz(11.1218, 7.0517, 42.8858)
Luminance	0.0705 (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

#373AB2 #B2AF37

analogous

#3777B2 #373AB2 #7237B2

triadic

#373AB2 #B2373A #3AB237

tetradic

#373AB2 #B23777 #B2AF37 #37B272

square

#373AB2 #B23777 #B2AF37 #37B272

split-complementary

#373AB2 #B27237 #77B237

monochromatic

#1A1C54 #292B83 #373AB2 #5A5DCC #898BDB

Accessibility & contrast

On white

8.71

#373AB2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#373AB2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373AB2

8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373AB2	#FFFFFF	#000000	##FFFFFF
##373AB2	1.00	8.71	2.41	8.71
#FFFFFF	8.71	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B6

Deuteranopia (green-blind)

#0045B0

Tritanopia (blue-blind)

#005A71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #373ab2;
/* rgb */ color: rgb(55, 58, 178);
/* oklch */ color: oklch(42.9% 0.185 274.2);

Tailwind

colors: {
  custom: {
    50: '#7e71ca',
    500: '#373ab2',
    950: '#000000',
  },
}

SCSS

$custom: #373ab2;
$custom-light: #7e71ca;
$custom-dark: #000000;

JSON

{
  "hex": "#373ab2",
  "rgb": {
    "r": 55,
    "g": 58,
    "b": 178
  },
  "hsl": {
    "h": 238.537,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.42883,
    "c": 0.18531,
    "h": 274.2
  },
  "luminance": 0.07053
}

Semantic roles & 50–950 ramp

primary

#373AB2

secondary

#C5C380

accent

#D94CDC

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #373AB2

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

Preview Lab → · Contrast checker → · Palette generator →