#373EB3#373EB3

#373EB3 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.7% C 0.182 H 273.4°. Best body text is #FFFFFF at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#373EB3
RGB	rgb(55, 62, 179)
HSL	hsl(237, 53%, 46%)
HSV	hsv(237, 69%, 70%)
CMYK	cmyk(69.3%, 65.4%, 0%, 29.8%)
CIE-LAB	lab(32.94, 35.85, -62.90)
CIE-LCH	lch(32.94, 72.40, 299.68°)
OKLab	oklab(43.65% 0.0108 -0.1816)
OKLCH	oklch(43.65% 0.182 273.4)
XYZ	xyz(11.4321, 7.5111, 43.4864)
Luminance	0.0751 (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

#373EB3 #B3AC37

analogous

#377CB3 #373EB3 #6E37B3

triadic

#373EB3 #B3373E #3EB337

tetradic

#373EB3 #B3377C #B3AC37 #37B36E

square

#373EB3 #B3377C #B3AC37 #37B36E

split-complementary

#373EB3 #B36E37 #7CB337

monochromatic

#1A1E55 #292E84 #373EB3 #5B61CD #8A8EDB

Accessibility & contrast

On white

8.39

#373EB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#373EB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373EB3

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373EB3	#FFFFFF	#000000	##FFFFFF
##373EB3	1.00	8.39	2.50	8.39
#FFFFFF	8.39	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B7

Deuteranopia (green-blind)

#0048B1

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #373eb3;
/* rgb */ color: rgb(55, 62, 179);
/* oklch */ color: oklch(43.7% 0.182 273.4);

Tailwind

colors: {
  custom: {
    50: '#7e73cb',
    500: '#373eb3',
    950: '#000000',
  },
}

SCSS

$custom: #373eb3;
$custom-light: #7e73cb;
$custom-dark: #000000;

JSON

{
  "hex": "#373eb3",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 179
  },
  "hsl": {
    "h": 236.613,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.43652,
    "c": 0.18195,
    "h": 273.4
  },
  "luminance": 0.07512
}

Semantic roles & 50–950 ramp

primary

#373EB3

secondary

#C5C181

accent

#D44BDC

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373EB3

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

Preview Lab → · Contrast checker → · Palette generator →