#373FAA#373FAA

#373FAA is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.0% C 0.169 H 273.6°. Best body text is #FFFFFF at 8.56:1 contrast (WCAG AA passes).

Color values

HEX	#373FAA
RGB	rgb(55, 63, 170)
HSL	hsl(236, 51%, 44%)
HSV	hsv(236, 68%, 67%)
CMYK	cmyk(67.6%, 62.9%, 0%, 33.3%)
CIE-LAB	lab(32.41, 32.05, -58.41)
CIE-LCH	lch(32.41, 66.62, 298.76°)
OKLab	oklab(43.02% 0.0106 -0.1684)
OKLCH	oklch(43.02% 0.169 273.6)
XYZ	xyz(10.6063, 7.2686, 38.8664)
Luminance	0.0727 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.97

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373FAA #AAA237

analogous

#3779AA #373FAA #6937AA

triadic

#373FAA #AA373F #3FAA37

tetradic

#373FAA #AA3779 #AAA237 #37AA69

square

#373FAA #AA3779 #AAA237 #37AA69

split-complementary

#373FAA #AA6937 #79AA37

monochromatic

#191D4E #282E7C #373FAA #565EC8 #848AD7

Accessibility & contrast

On white

8.56

#373FAA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#373FAA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FAA

8.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FAA	#FFFFFF	#000000	##FFFFFF
##373FAA	1.00	8.56	2.45	8.56
#FFFFFF	8.56	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052AD

Deuteranopia (green-blind)

#0047A8

Tritanopia (blue-blind)

#005A6E

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #373faa;
/* rgb */ color: rgb(55, 63, 170);
/* oklch */ color: oklch(43.0% 0.169 273.6);

Tailwind

colors: {
  custom: {
    50: '#7c74c4',
    500: '#373faa',
    950: '#000000',
  },
}

SCSS

$custom: #373faa;
$custom-light: #7c74c4;
$custom-dark: #000000;

JSON

{
  "hex": "#373faa",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 170
  },
  "hsl": {
    "h": 235.826,
    "s": 51.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.43023,
    "c": 0.16879,
    "h": 273.6
  },
  "luminance": 0.0727
}

Semantic roles & 50–950 ramp

primary

#373FAA

secondary

#C1BC7C

accent

#D14DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373FAA

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

Preview Lab → · Contrast checker → · Palette generator →