#373BB5#373BB5

#373BB5 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.3% C 0.188 H 273.9°. Best body text is #FFFFFF at 8.55:1 contrast (WCAG AA passes).

Color values

HEX	#373BB5
RGB	rgb(55, 59, 181)
HSL	hsl(238, 53%, 46%)
HSV	hsv(238, 70%, 71%)
CMYK	cmyk(69.6%, 67.4%, 0%, 29%)
CIE-LAB	lab(32.43, 38.40, -64.94)
CIE-LCH	lch(32.43, 75.44, 300.60°)
OKLab	oklab(43.33% 0.0127 -0.1876)
OKLCH	oklch(43.33% 0.188 273.9)
XYZ	xyz(11.4772, 7.2753, 44.5065)
Luminance	0.0728 (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

#373BB5 #B5B137

analogous

#377AB5 #373BB5 #7237B5

triadic

#373BB5 #B5373B #3BB537

tetradic

#373BB5 #B5377A #B5B137 #37B572

square

#373BB5 #B5377A #B5B137 #37B572

split-complementary

#373BB5 #B57237 #7AB537

monochromatic

#1A1C57 #292C86 #373BB5 #5C5FCD #8B8DDC

Accessibility & contrast

On white

8.55

#373BB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#373BB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373BB5

8.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373BB5	#FFFFFF	#000000	##FFFFFF
##373BB5	1.00	8.55	2.46	8.55
#FFFFFF	8.55	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B9

Deuteranopia (green-blind)

#0046B3

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #373bb5;
/* rgb */ color: rgb(55, 59, 181);
/* oklch */ color: oklch(43.3% 0.188 273.9);

Tailwind

colors: {
  custom: {
    50: '#7f71cc',
    500: '#373bb5',
    950: '#000000',
  },
}

SCSS

$custom: #373bb5;
$custom-light: #7f71cc;
$custom-dark: #000000;

JSON

{
  "hex": "#373bb5",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 181
  },
  "hsl": {
    "h": 238.095,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.4333,
    "c": 0.18803,
    "h": 273.9
  },
  "luminance": 0.07276
}

Semantic roles & 50–950 ramp

primary

#373BB5

secondary

#C6C482

accent

#D84BDD

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #373BB5

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

Preview Lab → · Contrast checker → · Palette generator →