#3737C9#3737C9

#3737C9 is a dark, highly saturated blue. Relative luminance 0.078; OKLCH L 44.7% C 0.217 H 273.2°. Best body text is #FFFFFF at 8.23:1 contrast (WCAG AA passes).

Color values

HEX	#3737C9
RGB	rgb(55, 55, 201)
HSL	hsl(240, 57%, 50%)
HSV	hsv(240, 73%, 79%)
CMYK	cmyk(72.6%, 72.6%, 0%, 21.2%)
CIE-LAB	lab(33.48, 47.48, -74.97)
CIE-LCH	lch(33.48, 88.74, 302.35°)
OKLab	oklab(44.67% 0.0123 -0.2169)
OKLCH	oklch(44.67% 0.217 273.2)
XYZ	xyz(13.4808, 7.7603, 56.0344)
Luminance	0.0776 (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

#3737C9 #C9C937

analogous

#3780C9 #3737C9 #8037C9

triadic

#3737C9 #C93737 #37C937

tetradic

#3737C9 #C93780 #C9C937 #37C980

square

#3737C9 #C93780 #C9C937 #37C980

split-complementary

#3737C9 #C98037 #80C937

monochromatic

#1C1C69 #292999 #3737C9 #6767D6 #9797E3

Accessibility & contrast

On white

8.23

#3737C9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#3737C9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3737C9

8.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3737C9	#FFFFFF	#000000	##FFFFFF
##3737C9	1.00	8.23	2.55	8.23
#FFFFFF	8.23	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056CD

Deuteranopia (green-blind)

#0048C6

Tritanopia (blue-blind)

#00617D

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3737c9;
/* rgb */ color: rgb(55, 55, 201);
/* oklch */ color: oklch(44.7% 0.217 273.2);

Tailwind

colors: {
  custom: {
    50: '#846fdb',
    500: '#3737c9',
    950: '#000000',
  },
}

SCSS

$custom: #3737c9;
$custom-light: #846fdb;
$custom-dark: #000000;

JSON

{
  "hex": "#3737c9",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 201
  },
  "hsl": {
    "h": 240,
    "s": 57.48,
    "l": 50.196
  },
  "oklch": {
    "l": 0.44665,
    "c": 0.21723,
    "h": 273.2
  },
  "luminance": 0.07762
}

Semantic roles & 50–950 ramp

primary

#3737C9

secondary

#CFCF8D

accent

#E147E1

background

#F8F6FD

surface

#F0ECFB

border

#CBC7D4

text

#0D0715

muted

#7D7A83

Preview Lab

Preview with #3737C9

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

Preview Lab → · Contrast checker → · Palette generator →