#373DA4#373DA4

#373DA4 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.1% C 0.163 H 274.4°. Best body text is #FFFFFF at 8.88:1 contrast (WCAG AA passes).

Color values

HEX	#373DA4
RGB	rgb(55, 61, 164)
HSL	hsl(237, 50%, 43%)
HSV	hsv(237, 66%, 64%)
CMYK	cmyk(66.5%, 62.8%, 0%, 35.7%)
CIE-LAB	lab(31.41, 31.22, -56.43)
CIE-LCH	lch(31.41, 64.49, 298.95°)
OKLab	oklab(42.13% 0.0126 -0.1627)
OKLCH	oklch(42.13% 0.163 274.4)
XYZ	xyz(9.9429, 6.8292, 35.9089)
Luminance	0.0683 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373DA4 #A49E37

analogous

#3774A4 #373DA4 #6737A4

triadic

#373DA4 #A4373D #3DA437

tetradic

#373DA4 #A43774 #A49E37 #37A467

square

#373DA4 #A43774 #A49E37 #37A467

split-complementary

#373DA4 #A46737 #74A437

monochromatic

#181B48 #282C76 #373DA4 #5359C5 #8185D5

Accessibility & contrast

On white

8.88

#373DA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#373DA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DA4

8.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DA4	#FFFFFF	#000000	##FFFFFF
##373DA4	1.00	8.88	2.37	8.88
#FFFFFF	8.88	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA7

Deuteranopia (green-blind)

#0045A2

Tritanopia (blue-blind)

#00576A

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #373da4;
/* rgb */ color: rgb(55, 61, 164);
/* oklch */ color: oklch(42.1% 0.163 274.4);

Tailwind

colors: {
  custom: {
    50: '#7b72c0',
    500: '#373da4',
    950: '#000000',
  },
}

SCSS

$custom: #373da4;
$custom-light: #7b72c0;
$custom-dark: #000000;

JSON

{
  "hex": "#373da4",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 164
  },
  "hsl": {
    "h": 236.697,
    "s": 49.772,
    "l": 42.941
  },
  "oklch": {
    "l": 0.42134,
    "c": 0.16314,
    "h": 274.4
  },
  "luminance": 0.0683
}

Semantic roles & 50–950 ramp

primary

#373DA4

secondary

#BEBA79

accent

#D24FD9

background

#F8F6FB

surface

#EFECF7

border

#CAC7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #373DA4

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

Preview Lab → · Contrast checker → · Palette generator →