#3737CA#3737CA

#3737CA is a dark, highly saturated blue. Relative luminance 0.078; OKLCH L 44.8% C 0.218 H 273.2°. Best body text is #FFFFFF at 8.20:1 contrast (WCAG AA passes).

Color values

HEX	#3737CA
RGB	rgb(55, 55, 202)
HSL	hsl(240, 58%, 50%)
HSV	hsv(240, 73%, 79%)
CMYK	cmyk(72.8%, 72.8%, 0%, 20.8%)
CIE-LAB	lab(33.58, 47.81, -75.38)
CIE-LCH	lch(33.58, 89.27, 302.38°)
OKLab	oklab(44.77% 0.0121 -0.2181)
OKLCH	oklch(44.77% 0.218 273.2)
XYZ	xyz(13.5988, 7.8075, 56.6560)
Luminance	0.0781 (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

#3737CA #CACA37

analogous

#3780CA #3737CA #8037CA

triadic

#3737CA #CA3737 #37CA37

tetradic

#3737CA #CA3780 #CACA37 #37CA80

square

#3737CA #CA3780 #CACA37 #37CA80

split-complementary

#3737CA #CA8037 #80CA37

monochromatic

#1C1C6A #29299B #3737CA #6767D7 #9898E4

Accessibility & contrast

On white

8.20

#3737CA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#3737CA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3737CA

8.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3737CA	#FFFFFF	#000000	##FFFFFF
##3737CA	1.00	8.20	2.56	8.20
#FFFFFF	8.20	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056CE

Deuteranopia (green-blind)

#0048C7

Tritanopia (blue-blind)

#00617D

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3737ca;
/* rgb */ color: rgb(55, 55, 202);
/* oklch */ color: oklch(44.8% 0.218 273.2);

Tailwind

colors: {
  custom: {
    50: '#846fdb',
    500: '#3737ca',
    950: '#000000',
  },
}

SCSS

$custom: #3737ca;
$custom-light: #846fdb;
$custom-dark: #000000;

JSON

{
  "hex": "#3737ca",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 202
  },
  "hsl": {
    "h": 240,
    "s": 58.103,
    "l": 50.392
  },
  "oklch": {
    "l": 0.44766,
    "c": 0.21843,
    "h": 273.2
  },
  "luminance": 0.07809
}

Semantic roles & 50–950 ramp

primary

#3737CA

secondary

#CFCF8E

accent

#E146E1

background

#F8F6FD

surface

#F0ECFB

border

#CBC7D4

text

#0D0715

muted

#7D7A83

Preview Lab

Preview with #3737CA

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

Preview Lab → · Contrast checker → · Palette generator →