#373AA0#373AA0

#373AA0 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.2% C 0.161 H 275.4°. Best body text is #FFFFFF at 9.23:1 contrast (WCAG AA passes).

Color values

HEX	#373AA0
RGB	rgb(55, 58, 160)
HSL	hsl(238, 49%, 42%)
HSV	hsv(238, 66%, 63%)
CMYK	cmyk(65.6%, 63.8%, 0%, 37.3%)
CIE-LAB	lab(30.34, 31.74, -55.77)
CIE-LCH	lch(30.34, 64.17, 299.64°)
OKLab	oklab(41.24% 0.0153 -0.1607)
OKLCH	oklch(41.24% 0.161 275.4)
XYZ	xyz(9.4317, 6.3756, 33.9845)
Luminance	0.0638 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.86

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373AA0 #A09D37

analogous

#376EA0 #373AA0 #6937A0

triadic

#373AA0 #A0373A #3AA037

tetradic

#373AA0 #A0376E #A09D37 #37A069

square

#373AA0 #A0376E #A09D37 #37A069

split-complementary

#373AA0 #A06937 #6EA037

monochromatic

#181945 #272972 #373AA0 #5154C3 #7F81D3

Accessibility & contrast

On white

9.23

#373AA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#373AA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373AA0

9.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373AA0	#FFFFFF	#000000	##FFFFFF
##373AA0	1.00	9.23	2.28	9.23
#FFFFFF	9.23	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA3

Deuteranopia (green-blind)

#00439E

Tritanopia (blue-blind)

#005467

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #373aa0;
/* rgb */ color: rgb(55, 58, 160);
/* oklch */ color: oklch(41.2% 0.161 275.4);

Tailwind

colors: {
  custom: {
    50: '#7b70bd',
    500: '#373aa0',
    950: '#000000',
  },
}

SCSS

$custom: #373aa0;
$custom-light: #7b70bd;
$custom-dark: #000000;

JSON

{
  "hex": "#373aa0",
  "rgb": {
    "r": 55,
    "g": 58,
    "b": 160
  },
  "hsl": {
    "h": 238.286,
    "s": 48.837,
    "l": 42.157
  },
  "oklch": {
    "l": 0.41241,
    "c": 0.16147,
    "h": 275.4
  },
  "luminance": 0.06376
}

Semantic roles & 50–950 ramp

primary

#373AA0

secondary

#BCBA77

accent

#D44FD8

background

#F8F6FB

surface

#EFECF7

border

#CAC7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #373AA0

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

Preview Lab → · Contrast checker → · Palette generator →