#373CA4#373CA4

#373CA4 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.0% C 0.164 H 274.7°. Best body text is #FFFFFF at 8.96:1 contrast (WCAG AA passes).

Color values

HEX	#373CA4
RGB	rgb(55, 60, 164)
HSL	hsl(237, 50%, 43%)
HSV	hsv(237, 66%, 64%)
CMYK	cmyk(66.5%, 63.4%, 0%, 35.7%)
CIE-LAB	lab(31.17, 31.86, -56.83)
CIE-LCH	lch(31.17, 65.15, 299.28°)
OKLab	oklab(41.95% 0.0134 -0.1638)
OKLCH	oklch(41.95% 0.164 274.7)
XYZ	xyz(9.8900, 6.7234, 35.8913)
Luminance	0.0672 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.45

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373CA4 #A49F37

analogous

#3772A4 #373CA4 #6937A4

triadic

#373CA4 #A4373C #3CA437

tetradic

#373CA4 #A43772 #A49F37 #37A469

square

#373CA4 #A43772 #A49F37 #37A469

split-complementary

#373CA4 #A46937 #72A437

monochromatic

#181A48 #282B76 #373CA4 #5358C5 #8185D5

Accessibility & contrast

On white

8.96

#373CA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#373CA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373CA4

8.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373CA4	#FFFFFF	#000000	##FFFFFF
##373CA4	1.00	8.96	2.34	8.96
#FFFFFF	8.96	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA7

Deuteranopia (green-blind)

#0045A2

Tritanopia (blue-blind)

#00566A

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #373ca4;
/* rgb */ color: rgb(55, 60, 164);
/* oklch */ color: oklch(42.0% 0.164 274.7);

Tailwind

colors: {
  custom: {
    50: '#7b72c0',
    500: '#373ca4',
    950: '#000000',
  },
}

SCSS

$custom: #373ca4;
$custom-light: #7b72c0;
$custom-dark: #000000;

JSON

{
  "hex": "#373ca4",
  "rgb": {
    "r": 55,
    "g": 60,
    "b": 164
  },
  "hsl": {
    "h": 237.248,
    "s": 49.772,
    "l": 42.941
  },
  "oklch": {
    "l": 0.41953,
    "c": 0.1644,
    "h": 274.7
  },
  "luminance": 0.06724
}

Semantic roles & 50–950 ramp

primary

#373CA4

secondary

#BEBB79

accent

#D34FD9

background

#F8F6FB

surface

#EFECF7

border

#CAC7D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #373CA4

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

Preview Lab → · Contrast checker → · Palette generator →