#373AB1#373AB1

#373AB1 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.8% C 0.184 H 274.3°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#373AB1
RGB	rgb(55, 58, 177)
HSL	hsl(239, 53%, 45%)
HSV	hsv(239, 69%, 69%)
CMYK	cmyk(68.9%, 67.2%, 0%, 30.6%)
CIE-LAB	lab(31.83, 37.65, -63.53)
CIE-LCH	lch(31.83, 73.85, 300.65°)
OKLab	oklab(42.79% 0.0138 -0.1835)
OKLCH	oklch(42.79% 0.184 274.3)
XYZ	xyz(11.0218, 7.0116, 42.3590)
Luminance	0.0701 (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

#373AB1 #B1AE37

analogous

#3777B1 #373AB1 #7137B1

triadic

#373AB1 #B1373A #3AB137

tetradic

#373AB1 #B13777 #B1AE37 #37B171

square

#373AB1 #B13777 #B1AE37 #37B171

split-complementary

#373AB1 #B17137 #77B137

monochromatic

#1A1B54 #282B82 #373AB1 #5A5CCC #888ADA

Accessibility & contrast

On white

8.74

#373AB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#373AB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373AB1

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373AB1	#FFFFFF	#000000	##FFFFFF
##373AB1	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B5

Deuteranopia (green-blind)

#0045AF

Tritanopia (blue-blind)

#005A70

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #373ab1;
/* rgb */ color: rgb(55, 58, 177);
/* oklch */ color: oklch(42.8% 0.184 274.3);

Tailwind

colors: {
  custom: {
    50: '#7e71c9',
    500: '#373ab1',
    950: '#000000',
  },
}

SCSS

$custom: #373ab1;
$custom-light: #7e71c9;
$custom-dark: #000000;

JSON

{
  "hex": "#373ab1",
  "rgb": {
    "r": 55,
    "g": 58,
    "b": 177
  },
  "hsl": {
    "h": 238.525,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.42789,
    "c": 0.18401,
    "h": 274.3
  },
  "luminance": 0.07013
}

Semantic roles & 50–950 ramp

primary

#373AB1

secondary

#C4C280

accent

#D84CDC

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #373AB1

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

Preview Lab → · Contrast checker → · Palette generator →