#373FAD#373FAD

#373FAD is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.3% C 0.173 H 273.5°. Best body text is #FFFFFF at 8.48:1 contrast (WCAG AA passes).

Color values

HEX	#373FAD
RGB	rgb(55, 63, 173)
HSL	hsl(236, 52%, 45%)
HSV	hsv(236, 68%, 68%)
CMYK	cmyk(68.2%, 63.6%, 0%, 32.2%)
CIE-LAB	lab(32.66, 33.11, -59.79)
CIE-LCH	lch(32.66, 68.34, 298.98°)
OKLab	oklab(43.29% 0.0105 -0.1725)
OKLCH	oklch(43.29% 0.173 273.5)
XYZ	xyz(10.8934, 7.3834, 40.3781)
Luminance	0.0738 (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

#373FAD #ADA537

analogous

#377AAD #373FAD #6A37AD

triadic

#373FAD #AD373F #3FAD37

tetradic

#373FAD #AD377A #ADA537 #37AD6A

square

#373FAD #AD377A #ADA537 #37AD6A

split-complementary

#373FAD #AD6A37 #7AAD37

monochromatic

#191D50 #282E7F #373FAD #575FCA #868CD8

Accessibility & contrast

On white

8.48

#373FAD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#373FAD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FAD

8.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FAD	#FFFFFF	#000000	##FFFFFF
##373FAD	1.00	8.48	2.48	8.48
#FFFFFF	8.48	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B1

Deuteranopia (green-blind)

#0048AB

Tritanopia (blue-blind)

#005B70

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #373fad;
/* rgb */ color: rgb(55, 63, 173);
/* oklch */ color: oklch(43.3% 0.173 273.5);

Tailwind

colors: {
  custom: {
    50: '#7d74c6',
    500: '#373fad',
    950: '#000000',
  },
}

SCSS

$custom: #373fad;
$custom-light: #7d74c6;
$custom-dark: #000000;

JSON

{
  "hex": "#373fad",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 173
  },
  "hsl": {
    "h": 235.932,
    "s": 51.754,
    "l": 44.706
  },
  "oklch": {
    "l": 0.43287,
    "c": 0.17281,
    "h": 273.5
  },
  "luminance": 0.07384
}

Semantic roles & 50–950 ramp

primary

#373FAD

secondary

#C2BE7D

accent

#D24DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373FAD

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

Preview Lab → · Contrast checker → · Palette generator →