#3737C1#3737C1

#3737C1 is a dark, highly saturated blue. Relative luminance 0.074; OKLCH L 43.9% C 0.207 H 273.7°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#3737C1
RGB	rgb(55, 55, 193)
HSL	hsl(240, 56%, 49%)
HSV	hsv(240, 72%, 76%)
CMYK	cmyk(71.5%, 71.5%, 0%, 24.3%)
CIE-LAB	lab(32.69, 44.85, -71.59)
CIE-LCH	lch(32.69, 84.48, 302.07°)
OKLab	oklab(43.86% 0.0136 -0.207)
OKLCH	oklch(43.86% 0.207 273.7)
XYZ	xyz(12.5642, 7.3936, 51.2067)
Luminance	0.0740 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3737C1 #C1C137

analogous

#377CC1 #3737C1 #7C37C1

triadic

#3737C1 #C13737 #37C137

tetradic

#3737C1 #C1377C #C1C137 #37C17C

square

#3737C1 #C1377C #C1C137 #37C17C

split-complementary

#3737C1 #C17C37 #7CC137

monochromatic

#1C1C62 #292991 #3737C1 #6363D2 #9292E0

Accessibility & contrast

On white

8.47

#3737C1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#3737C1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3737C1

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3737C1	#FFFFFF	#000000	##FFFFFF
##3737C1	1.00	8.47	2.48	8.47
#FFFFFF	8.47	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053C5

Deuteranopia (green-blind)

#0046BE

Tritanopia (blue-blind)

#005E78

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3737c1;
/* rgb */ color: rgb(55, 55, 193);
/* oklch */ color: oklch(43.9% 0.207 273.7);

Tailwind

colors: {
  custom: {
    50: '#826fd5',
    500: '#3737c1',
    950: '#000000',
  },
}

SCSS

$custom: #3737c1;
$custom-light: #826fd5;
$custom-dark: #000000;

JSON

{
  "hex": "#3737c1",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 193
  },
  "hsl": {
    "h": 240,
    "s": 55.645,
    "l": 48.627
  },
  "oklch": {
    "l": 0.43862,
    "c": 0.20748,
    "h": 273.7
  },
  "luminance": 0.07395
}

Semantic roles & 50–950 ramp

primary

#3737C1

secondary

#CBCB89

accent

#DF49DF

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3737C1

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

Preview Lab → · Contrast checker → · Palette generator →