#373FB3#373FB3

#373FB3 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.8% C 0.181 H 273.2°. Best body text is #FFFFFF at 8.32:1 contrast (WCAG AA passes).

Color values

HEX	#373FB3
RGB	rgb(55, 63, 179)
HSL	hsl(236, 53%, 46%)
HSV	hsv(236, 69%, 70%)
CMYK	cmyk(69.3%, 64.8%, 0%, 29.8%)
CIE-LAB	lab(33.18, 35.22, -62.51)
CIE-LCH	lch(33.18, 71.75, 299.40°)
OKLab	oklab(43.83% 0.0101 -0.1805)
OKLCH	oklch(43.83% 0.181 273.2)
XYZ	xyz(11.4870, 7.6208, 43.5047)
Luminance	0.0762 (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

#373FB3 #B3AB37

analogous

#377DB3 #373FB3 #6D37B3

triadic

#373FB3 #B3373F #3FB337

tetradic

#373FB3 #B3377D #B3AB37 #37B36D

square

#373FB3 #B3377D #B3AB37 #37B36D

split-complementary

#373FB3 #B36D37 #7DB337

monochromatic

#1A1E55 #292F84 #373FB3 #5B62CD #8A8FDB

Accessibility & contrast

On white

8.32

#373FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#373FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FB3

8.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FB3	#FFFFFF	#000000	##FFFFFF
##373FB3	1.00	8.32	2.52	8.32
#FFFFFF	8.32	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B7

Deuteranopia (green-blind)

#0048B1

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373fb3;
/* rgb */ color: rgb(55, 63, 179);
/* oklch */ color: oklch(43.8% 0.181 273.2);

Tailwind

colors: {
  custom: {
    50: '#7e74cb',
    500: '#373fb3',
    950: '#000000',
  },
}

SCSS

$custom: #373fb3;
$custom-light: #7e74cb;
$custom-dark: #000000;

JSON

{
  "hex": "#373fb3",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 179
  },
  "hsl": {
    "h": 236.129,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.43825,
    "c": 0.18077,
    "h": 273.2
  },
  "luminance": 0.07622
}

Semantic roles & 50–950 ramp

primary

#373FB3

secondary

#C5C181

accent

#D34BDC

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373FB3

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

Preview Lab → · Contrast checker → · Palette generator →