#373AA6#373AA6

#373AA6 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.8% C 0.170 H 275.0°. Best body text is #FFFFFF at 9.06:1 contrast (WCAG AA passes).

Color values

HEX	#373AA6
RGB	rgb(55, 58, 166)
HSL	hsl(238, 50%, 43%)
HSV	hsv(238, 67%, 65%)
CMYK	cmyk(66.9%, 65.1%, 0%, 34.9%)
CIE-LAB	lab(30.86, 33.83, -58.55)
CIE-LCH	lch(30.86, 67.62, 300.02°)
OKLab	oklab(41.78% 0.0149 -0.1689)
OKLCH	oklch(41.78% 0.17 275)
XYZ	xyz(9.9693, 6.5906, 36.8157)
Luminance	0.0659 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.12

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373AA6 #A6A337

analogous

#3771A6 #373AA6 #6B37A6

triadic

#373AA6 #A6373A #3AA637

tetradic

#373AA6 #A63771 #A6A337 #37A66B

square

#373AA6 #A63771 #A6A337 #37A66B

split-complementary

#373AA6 #A66B37 #71A637

monochromatic

#191A4A #282A78 #373AA6 #5457C6 #8284D6

Accessibility & contrast

On white

9.06

#373AA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#373AA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373AA6

9.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373AA6	#FFFFFF	#000000	##FFFFFF
##373AA6	1.00	9.06	2.32	9.06
#FFFFFF	9.06	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA9

Deuteranopia (green-blind)

#0044A4

Tritanopia (blue-blind)

#00566A

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #373aa6;
/* rgb */ color: rgb(55, 58, 166);
/* oklch */ color: oklch(41.8% 0.170 275.0);

Tailwind

colors: {
  custom: {
    50: '#7c70c1',
    500: '#373aa6',
    950: '#000000',
  },
}

SCSS

$custom: #373aa6;
$custom-light: #7c70c1;
$custom-dark: #000000;

JSON

{
  "hex": "#373aa6",
  "rgb": {
    "r": 55,
    "g": 58,
    "b": 166
  },
  "hsl": {
    "h": 238.378,
    "s": 50.226,
    "l": 43.333
  },
  "oklch": {
    "l": 0.41778,
    "c": 0.16954,
    "h": 275
  },
  "luminance": 0.06592
}

Semantic roles & 50–950 ramp

primary

#373AA6

secondary

#BFBD7A

accent

#D64EDA

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #373AA6

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

Preview Lab → · Contrast checker → · Palette generator →