#373FA6#373FA6

#373FA6 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.7% C 0.163 H 273.8°. Best body text is #FFFFFF at 8.66:1 contrast (WCAG AA passes).

Color values

HEX	#373FA6
RGB	rgb(55, 63, 166)
HSL	hsl(236, 50%, 43%)
HSV	hsv(236, 67%, 65%)
CMYK	cmyk(66.9%, 62%, 0%, 34.9%)
CIE-LAB	lab(32.08, 30.64, -56.55)
CIE-LCH	lch(32.08, 64.32, 298.45°)
OKLab	oklab(42.67% 0.0108 -0.163)
OKLCH	oklch(42.67% 0.163 273.8)
XYZ	xyz(10.2337, 7.1195, 36.9039)
Luminance	0.0712 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373FA6 #A69E37

analogous

#3776A6 #373FA6 #6637A6

triadic

#373FA6 #A6373F #3FA637

tetradic

#373FA6 #A63776 #A69E37 #37A666

square

#373FA6 #A63776 #A69E37 #37A666

split-complementary

#373FA6 #A66637 #76A637

monochromatic

#191C4A #282E78 #373FA6 #545CC6 #8288D6

Accessibility & contrast

On white

8.66

#373FA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#373FA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FA6

8.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FA6	#FFFFFF	#000000	##FFFFFF
##373FA6	1.00	8.66	2.42	8.66
#FFFFFF	8.66	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A9

Deuteranopia (green-blind)

#0047A4

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #373fa6;
/* rgb */ color: rgb(55, 63, 166);
/* oklch */ color: oklch(42.7% 0.163 273.8);

Tailwind

colors: {
  custom: {
    50: '#7b74c1',
    500: '#373fa6',
    950: '#000000',
  },
}

SCSS

$custom: #373fa6;
$custom-light: #7b74c1;
$custom-dark: #000000;

JSON

{
  "hex": "#373fa6",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 166
  },
  "hsl": {
    "h": 235.676,
    "s": 50.226,
    "l": 43.333
  },
  "oklch": {
    "l": 0.42674,
    "c": 0.16336,
    "h": 273.8
  },
  "luminance": 0.0712
}

Semantic roles & 50–950 ramp

primary

#373FA6

secondary

#BFBA7A

accent

#D04EDA

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #373FA6

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

Preview Lab → · Contrast checker → · Palette generator →