#373FB4#373FB4

#373FB4 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.9% C 0.182 H 273.2°. Best body text is #FFFFFF at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#373FB4
RGB	rgb(55, 63, 180)
HSL	hsl(236, 53%, 46%)
HSV	hsv(236, 69%, 71%)
CMYK	cmyk(69.4%, 65%, 0%, 29.4%)
CIE-LAB	lab(33.27, 35.57, -62.96)
CIE-LCH	lch(33.27, 72.32, 299.46°)
OKLab	oklab(43.92% 0.01 -0.1818)
OKLCH	oklch(43.92% 0.182 273.2)
XYZ	xyz(11.5885, 7.6614, 44.0393)
Luminance	0.0766 (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

#373FB4 #B4AC37

analogous

#377DB4 #373FB4 #6D37B4

triadic

#373FB4 #B4373F #3FB437

tetradic

#373FB4 #B4377D #B4AC37 #37B46D

square

#373FB4 #B4377D #B4AC37 #37B46D

split-complementary

#373FB4 #B46D37 #7DB437

monochromatic

#1A1E56 #292F85 #373FB4 #5B63CD #8A8FDB

Accessibility & contrast

On white

8.29

#373FB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#373FB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FB4

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FB4	#FFFFFF	#000000	##FFFFFF
##373FB4	1.00	8.29	2.53	8.29
#FFFFFF	8.29	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B8

Deuteranopia (green-blind)

#0049B2

Tritanopia (blue-blind)

#005D74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373fb4;
/* rgb */ color: rgb(55, 63, 180);
/* oklch */ color: oklch(43.9% 0.182 273.2);

Tailwind

colors: {
  custom: {
    50: '#7e74cb',
    500: '#373fb4',
    950: '#000000',
  },
}

SCSS

$custom: #373fb4;
$custom-light: #7e74cb;
$custom-dark: #000000;

JSON

{
  "hex": "#373fb4",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 180
  },
  "hsl": {
    "h": 236.16,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.43916,
    "c": 0.18209,
    "h": 273.2
  },
  "luminance": 0.07663
}

Semantic roles & 50–950 ramp

primary

#373FB4

secondary

#C6C181

accent

#D34BDD

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373FB4

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

Preview Lab → · Contrast checker → · Palette generator →