#3737D4#3737D4

#3737D4 is a mid, highly saturated blue. Relative luminance 0.083; OKLCH L 45.8% C 0.230 H 272.6°. Best body text is #FFFFFF at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#3737D4
RGB	rgb(55, 55, 212)
HSL	hsl(240, 65%, 52%)
HSV	hsv(240, 74%, 83%)
CMYK	cmyk(74.1%, 74.1%, 0%, 16.9%)
CIE-LAB	lab(34.59, 51.05, -79.51)
CIE-LCH	lch(34.59, 94.49, 302.70°)
OKLab	oklab(45.79% 0.0104 -0.2301)
OKLCH	oklch(45.79% 0.23 272.6)
XYZ	xyz(14.8214, 8.2965, 63.0949)
Luminance	0.0830 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blurple

#5539CC

ΔE00 3.33

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3737D4 #D4D437

analogous

#3786D4 #3737D4 #8637D4

triadic

#3737D4 #D43737 #37D437

tetradic

#3737D4 #D43786 #D4D437 #37D486

square

#3737D4 #D43786 #D4D437 #37D486

split-complementary

#3737D4 #D48637 #86D437

monochromatic

#1A1A77 #2424A9 #3737D4 #6969DF #9C9CEA

Accessibility & contrast

On white

7.90

#3737D4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#3737D4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3737D4

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3737D4	#FFFFFF	#000000	##FFFFFF
##3737D4	1.00	7.90	2.66	7.90
#FFFFFF	7.90	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059D9

Deuteranopia (green-blind)

#004AD1

Tritanopia (blue-blind)

#006583

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3737d4;
/* rgb */ color: rgb(55, 55, 212);
/* oklch */ color: oklch(45.8% 0.230 272.6);

Tailwind

colors: {
  custom: {
    50: '#8670e3',
    500: '#3737d4',
    950: '#000000',
  },
}

SCSS

$custom: #3737d4;
$custom-light: #8670e3;
$custom-dark: #000000;

JSON

{
  "hex": "#3737d4",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 212
  },
  "hsl": {
    "h": 240,
    "s": 64.609,
    "l": 52.353
  },
  "oklch": {
    "l": 0.45789,
    "c": 0.23034,
    "h": 272.6
  },
  "luminance": 0.08298
}

Semantic roles & 50–950 ramp

primary

#3737D4

secondary

#D6D691

accent

#E840E8

background

#F9F6FE

surface

#F1ECFC

border

#CBC7D5

text

#0D0816

muted

#7E7B84

Preview Lab

Preview with #3737D4

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

Preview Lab → · Contrast checker → · Palette generator →