#373FAB#373FAB

#373FAB is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.1% C 0.170 H 273.6°. Best body text is #FFFFFF at 8.53:1 contrast (WCAG AA passes).

Color values

HEX	#373FAB
RGB	rgb(55, 63, 171)
HSL	hsl(236, 51%, 44%)
HSV	hsv(236, 68%, 67%)
CMYK	cmyk(67.8%, 63.2%, 0%, 32.9%)
CIE-LAB	lab(32.49, 32.41, -58.87)
CIE-LCH	lch(32.49, 67.20, 298.83°)
OKLab	oklab(43.11% 0.0106 -0.1698)
OKLCH	oklch(43.11% 0.17 273.6)
XYZ	xyz(10.7013, 7.3065, 39.3665)
Luminance	0.0731 (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

#373FAB #ABA337

analogous

#3779AB #373FAB #6937AB

triadic

#373FAB #AB373F #3FAB37

tetradic

#373FAB #AB3779 #ABA337 #37AB69

square

#373FAB #AB3779 #ABA337 #37AB69

split-complementary

#373FAB #AB6937 #79AB37

monochromatic

#191D4E #282E7D #373FAB #565EC9 #858AD8

Accessibility & contrast

On white

8.53

#373FAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#373FAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FAB

8.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FAB	#FFFFFF	#000000	##FFFFFF
##373FAB	1.00	8.53	2.46	8.53
#FFFFFF	8.53	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052AE

Deuteranopia (green-blind)

#0047A9

Tritanopia (blue-blind)

#005A6F

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #373fab;
/* rgb */ color: rgb(55, 63, 171);
/* oklch */ color: oklch(43.1% 0.170 273.6);

Tailwind

colors: {
  custom: {
    50: '#7d74c5',
    500: '#373fab',
    950: '#000000',
  },
}

SCSS

$custom: #373fab;
$custom-light: #7d74c5;
$custom-dark: #000000;

JSON

{
  "hex": "#373fab",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 171
  },
  "hsl": {
    "h": 235.862,
    "s": 51.327,
    "l": 44.314
  },
  "oklch": {
    "l": 0.43111,
    "c": 0.17013,
    "h": 273.6
  },
  "luminance": 0.07308
}

Semantic roles & 50–950 ramp

primary

#373FAB

secondary

#C1BD7C

accent

#D14DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373FAB

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

Preview Lab → · Contrast checker → · Palette generator →