#373BBB#373BBB

#373BBB is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.9% C 0.196 H 273.5°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#373BBB
RGB	rgb(55, 59, 187)
HSL	hsl(238, 55%, 47%)
HSV	hsv(238, 71%, 73%)
CMYK	cmyk(70.6%, 68.4%, 0%, 26.7%)
CIE-LAB	lab(32.98, 40.46, -67.58)
CIE-LCH	lch(32.98, 78.77, 300.91°)
OKLab	oklab(43.9% 0.012 -0.1953)
OKLCH	oklch(43.9% 0.196 273.5)
XYZ	xyz(12.1062, 7.5268, 47.8189)
Luminance	0.0753 (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

#373BBB #BBB737

analogous

#377DBB #373BBB #7537BB

triadic

#373BBB #BB373B #3BBB37

tetradic

#373BBB #BB377D #BBB737 #37BB75

square

#373BBB #BB377D #BBB737 #37BB75

split-complementary

#373BBB #BB7537 #7DBB37

monochromatic

#1B1D5C #292C8C #373BBB #5F63D0 #8E91DE

Accessibility & contrast

On white

8.38

#373BBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#373BBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373BBB

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373BBB	#FFFFFF	#000000	##FFFFFF
##373BBB	1.00	8.38	2.51	8.38
#FFFFFF	8.38	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BF

Deuteranopia (green-blind)

#0047B9

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373bbb;
/* rgb */ color: rgb(55, 59, 187);
/* oklch */ color: oklch(43.9% 0.196 273.5);

Tailwind

colors: {
  custom: {
    50: '#8072d1',
    500: '#373bbb',
    950: '#000000',
  },
}

SCSS

$custom: #373bbb;
$custom-light: #8072d1;
$custom-dark: #000000;

JSON

{
  "hex": "#373bbb",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 187
  },
  "hsl": {
    "h": 238.182,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.43898,
    "c": 0.1957,
    "h": 273.5
  },
  "luminance": 0.07528
}

Semantic roles & 50–950 ramp

primary

#373BBB

secondary

#C9C685

accent

#D94ADE

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #373BBB

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

Preview Lab → · Contrast checker → · Palette generator →