#373DAF#373DAF

#373DAF is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.1% C 0.178 H 273.8°. Best body text is #FFFFFF at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#373DAF
RGB	rgb(55, 61, 175)
HSL	hsl(237, 52%, 45%)
HSV	hsv(237, 69%, 69%)
CMYK	cmyk(68.6%, 65.1%, 0%, 31.4%)
CIE-LAB	lab(32.36, 35.08, -61.48)
CIE-LCH	lch(32.36, 70.79, 299.71°)
OKLab	oklab(43.11% 0.0119 -0.1775)
OKLCH	oklch(43.11% 0.178 273.8)
XYZ	xyz(10.9796, 7.2438, 41.3687)
Luminance	0.0725 (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

#373DAF #AFA937

analogous

#3779AF #373DAF #6D37AF

triadic

#373DAF #AF373D #3DAF37

tetradic

#373DAF #AF3779 #AFA937 #37AF6D

square

#373DAF #AF3779 #AFA937 #37AF6D

split-complementary

#373DAF #AF6D37 #79AF37

monochromatic

#1A1D52 #282D80 #373DAF #595ECB #878BD9

Accessibility & contrast

On white

8.57

#373DAF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#373DAF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DAF

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DAF	#FFFFFF	#000000	##FFFFFF
##373DAF	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)

#0052B3

Deuteranopia (green-blind)

#0047AD

Tritanopia (blue-blind)

#005B70

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #373daf;
/* rgb */ color: rgb(55, 61, 175);
/* oklch */ color: oklch(43.1% 0.178 273.8);

Tailwind

colors: {
  custom: {
    50: '#7e73c8',
    500: '#373daf',
    950: '#000000',
  },
}

SCSS

$custom: #373daf;
$custom-light: #7e73c8;
$custom-dark: #000000;

JSON

{
  "hex": "#373daf",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 175
  },
  "hsl": {
    "h": 237,
    "s": 52.174,
    "l": 45.098
  },
  "oklch": {
    "l": 0.43115,
    "c": 0.17788,
    "h": 273.8
  },
  "luminance": 0.07245
}

Semantic roles & 50–950 ramp

primary

#373DAF

secondary

#C3C07F

accent

#D44CDC

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373DAF

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

Preview Lab → · Contrast checker → · Palette generator →