#3733CC#3733CC

#3733CC is a dark, highly saturated blue. Relative luminance 0.075; OKLCH L 44.4% C 0.225 H 273.5°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#3733CC
RGB	rgb(55, 51, 204)
HSL	hsl(242, 60%, 50%)
HSV	hsv(242, 75%, 80%)
CMYK	cmyk(73%, 75%, 0%, 20%)
CIE-LAB	lab(33.00, 50.66, -77.50)
CIE-LCH	lch(33.00, 92.59, 303.17°)
OKLab	oklab(44.42% 0.0136 -0.2242)
OKLCH	oklch(44.42% 0.225 273.5)
XYZ	xyz(13.6548, 7.5381, 57.8504)
Luminance	0.0754 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blurple

#5539CC

ΔE00 3.63

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3733CC #C8CC33

analogous

#337BCC #3733CC #8433CC

triadic

#3733CC #CC3733 #33CC37

tetradic

#3733CC #CC337B #C8CC33 #33CC84

square

#3733CC #CC337B #C8CC33 #33CC84

split-complementary

#3733CC #CC8433 #7BCC33

monochromatic

#1D1B6A #2A279B #3733CC #6764D8 #9795E4

Accessibility & contrast

On white

8.37

#3733CC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#3733CC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733CC

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733CC	#FFFFFF	#000000	##FFFFFF
##3733CC	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055D0

Deuteranopia (green-blind)

#0046C9

Tritanopia (blue-blind)

#00607D

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3733cc;
/* rgb */ color: rgb(55, 51, 204);
/* oklch */ color: oklch(44.4% 0.225 273.5);

Tailwind

colors: {
  custom: {
    50: '#856ddd',
    500: '#3733cc',
    950: '#000000',
  },
}

SCSS

$custom: #3733cc;
$custom-light: #856ddd;
$custom-dark: #000000;

JSON

{
  "hex": "#3733cc",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 204
  },
  "hsl": {
    "h": 241.569,
    "s": 60,
    "l": 50
  },
  "oklch": {
    "l": 0.44418,
    "c": 0.22464,
    "h": 273.5
  },
  "luminance": 0.0754
}

Semantic roles & 50–950 ramp

primary

#3733CC

secondary

#CED08B

accent

#E345DF

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0715

muted

#7E7A83

Preview Lab

Preview with #3733CC

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

Preview Lab → · Contrast checker → · Palette generator →