#373EA7#373EA7

#373EA7 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.6% C 0.166 H 274.0°. Best body text is #FFFFFF at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#373EA7
RGB	rgb(55, 62, 167)
HSL	hsl(236, 50%, 44%)
HSV	hsv(236, 67%, 65%)
CMYK	cmyk(67.1%, 62.9%, 0%, 34.5%)
CIE-LAB	lab(31.91, 31.63, -57.42)
CIE-LCH	lch(31.91, 65.56, 298.85°)
OKLab	oklab(42.58% 0.0116 -0.1656)
OKLCH	oklch(42.58% 0.166 274)
XYZ	xyz(10.2709, 7.0466, 37.3706)
Luminance	0.0705 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373EA7 #A7A037

analogous

#3776A7 #373EA7 #6837A7

triadic

#373EA7 #A7373E #3EA737

tetradic

#373EA7 #A73776 #A7A037 #37A768

square

#373EA7 #A73776 #A7A037 #37A768

split-complementary

#373EA7 #A76837 #76A737

monochromatic

#191C4B #282D79 #373EA7 #545CC7 #8288D6

Accessibility & contrast

On white

8.72

#373EA7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#373EA7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373EA7

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373EA7	#FFFFFF	#000000	##FFFFFF
##373EA7	1.00	8.72	2.41	8.72
#FFFFFF	8.72	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AA

Deuteranopia (green-blind)

#0046A5

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #373ea7;
/* rgb */ color: rgb(55, 62, 167);
/* oklch */ color: oklch(42.6% 0.166 274.0);

Tailwind

colors: {
  custom: {
    50: '#7c73c2',
    500: '#373ea7',
    950: '#000000',
  },
}

SCSS

$custom: #373ea7;
$custom-light: #7c73c2;
$custom-dark: #000000;

JSON

{
  "hex": "#373ea7",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 167
  },
  "hsl": {
    "h": 236.25,
    "s": 50.45,
    "l": 43.529
  },
  "oklch": {
    "l": 0.42578,
    "c": 0.16597,
    "h": 274
  },
  "luminance": 0.07047
}

Semantic roles & 50–950 ramp

primary

#373EA7

secondary

#C0BB7A

accent

#D14EDA

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #373EA7

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

Preview Lab → · Contrast checker → · Palette generator →