#373EA1#373EA1

#373EA1 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.1% C 0.158 H 274.3°. Best body text is #FFFFFF at 8.87:1 contrast (WCAG AA passes).

Color values

HEX	#373EA1
RGB	rgb(55, 62, 161)
HSL	hsl(236, 49%, 42%)
HSV	hsv(236, 66%, 63%)
CMYK	cmyk(65.8%, 61.5%, 0%, 36.9%)
CIE-LAB	lab(31.42, 29.51, -54.62)
CIE-LCH	lch(31.42, 62.08, 298.38°)
OKLab	oklab(42.06% 0.0118 -0.1573)
OKLCH	oklch(42.06% 0.158 274.3)
XYZ	xyz(9.7291, 6.8298, 34.5169)
Luminance	0.0683 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373EA1 #A19A37

analogous

#3773A1 #373EA1 #6537A1

triadic

#373EA1 #A1373E #3EA137

tetradic

#373EA1 #A13773 #A19A37 #37A165

square

#373EA1 #A13773 #A19A37 #37A165

split-complementary

#373EA1 #A16537 #73A137

monochromatic

#181B46 #272C73 #373EA1 #5159C4 #7F85D3

Accessibility & contrast

On white

8.87

#373EA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#373EA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373EA1

8.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373EA1	#FFFFFF	#000000	##FFFFFF
##373EA1	1.00	8.87	2.37	8.87
#FFFFFF	8.87	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA4

Deuteranopia (green-blind)

#00459F

Tritanopia (blue-blind)

#005769

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #373ea1;
/* rgb */ color: rgb(55, 62, 161);
/* oklch */ color: oklch(42.1% 0.158 274.3);

Tailwind

colors: {
  custom: {
    50: '#7b73be',
    500: '#373ea1',
    950: '#000000',
  },
}

SCSS

$custom: #373ea1;
$custom-light: #7b73be;
$custom-dark: #000000;

JSON

{
  "hex": "#373ea1",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 161
  },
  "hsl": {
    "h": 236.038,
    "s": 49.074,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42058,
    "c": 0.15777,
    "h": 274.3
  },
  "luminance": 0.06831
}

Semantic roles & 50–950 ramp

primary

#373EA1

secondary

#BDB877

accent

#D04FD9

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #373EA1

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

Preview Lab → · Contrast checker → · Palette generator →