#373EA9#373EA9

#373EA9 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.8% C 0.169 H 273.9°. Best body text is #FFFFFF at 8.66:1 contrast (WCAG AA passes).

Color values

HEX	#373EA9
RGB	rgb(55, 62, 169)
HSL	hsl(236, 51%, 44%)
HSV	hsv(236, 67%, 66%)
CMYK	cmyk(67.5%, 63.3%, 0%, 33.7%)
CIE-LAB	lab(32.08, 32.34, -58.35)
CIE-LCH	lch(32.08, 66.71, 299.00°)
OKLab	oklab(42.75% 0.0115 -0.1683)
OKLCH	oklch(42.75% 0.169 273.9)
XYZ	xyz(10.4572, 7.1211, 38.3518)
Luminance	0.0712 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.99

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373EA9 #A9A237

analogous

#3777A9 #373EA9 #6937A9

triadic

#373EA9 #A9373E #3EA937

tetradic

#373EA9 #A93777 #A9A237 #37A969

square

#373EA9 #A93777 #A9A237 #37A969

split-complementary

#373EA9 #A96937 #77A937

monochromatic

#191C4D #282D7B #373EA9 #555CC8 #8489D7

Accessibility & contrast

On white

8.66

#373EA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#373EA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373EA9

8.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373EA9	#FFFFFF	#000000	##FFFFFF
##373EA9	1.00	8.66	2.42	8.66
#FFFFFF	8.66	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AC

Deuteranopia (green-blind)

#0046A7

Tritanopia (blue-blind)

#00596D

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #373ea9;
/* rgb */ color: rgb(55, 62, 169);
/* oklch */ color: oklch(42.8% 0.169 273.9);

Tailwind

colors: {
  custom: {
    50: '#7c73c3',
    500: '#373ea9',
    950: '#000000',
  },
}

SCSS

$custom: #373ea9;
$custom-light: #7c73c3;
$custom-dark: #000000;

JSON

{
  "hex": "#373ea9",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 169
  },
  "hsl": {
    "h": 236.316,
    "s": 50.893,
    "l": 43.922
  },
  "oklch": {
    "l": 0.42754,
    "c": 0.16867,
    "h": 273.9
  },
  "luminance": 0.07122
}

Semantic roles & 50–950 ramp

primary

#373EA9

secondary

#C0BC7B

accent

#D24DDA

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373EA9

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

Preview Lab → · Contrast checker → · Palette generator →