#373CBB#373CBB

#373CBB is a dark, vivid blue. Relative luminance 0.076; OKLCH L 44.1% C 0.195 H 273.4°. Best body text is #FFFFFF at 8.31:1 contrast (WCAG AA passes).

Color values

HEX	#373CBB
RGB	rgb(55, 60, 187)
HSL	hsl(238, 55%, 47%)
HSV	hsv(238, 71%, 73%)
CMYK	cmyk(70.6%, 67.9%, 0%, 26.7%)
CIE-LAB	lab(33.20, 39.85, -67.21)
CIE-LCH	lch(33.20, 78.14, 300.67°)
OKLab	oklab(44.06% 0.0114 -0.1942)
OKLCH	oklch(44.06% 0.195 273.4)
XYZ	xyz(12.1580, 7.6306, 47.8362)
Luminance	0.0763 (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

#373CBB #BBB637

analogous

#377EBB #373CBB #7437BB

triadic

#373CBB #BB373C #3CBB37

tetradic

#373CBB #BB377E #BBB637 #37BB74

square

#373CBB #BB377E #BBB637 #37BB74

split-complementary

#373CBB #BB7437 #7EBB37

monochromatic

#1B1E5C #292D8C #373CBB #5F63D0 #8E91DE

Accessibility & contrast

On white

8.31

#373CBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#373CBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373CBB

8.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373CBB	#FFFFFF	#000000	##FFFFFF
##373CBB	1.00	8.31	2.53	8.31
#FFFFFF	8.31	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BF

Deuteranopia (green-blind)

#0048B9

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373cbb;
/* rgb */ color: rgb(55, 60, 187);
/* oklch */ color: oklch(44.1% 0.195 273.4);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#373cbb",
  "rgb": {
    "r": 55,
    "g": 60,
    "b": 187
  },
  "hsl": {
    "h": 237.727,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.4406,
    "c": 0.19458,
    "h": 273.4
  },
  "luminance": 0.07632
}

Semantic roles & 50–950 ramp

primary

#373CBB

secondary

#C9C685

accent

#D84ADE

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #373CBB

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

Preview Lab → · Contrast checker → · Palette generator →