#3733C9#3733C9

#3733C9 is a dark, highly saturated blue. Relative luminance 0.074; OKLCH L 44.1% C 0.221 H 273.7°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#3733C9
RGB	rgb(55, 51, 201)
HSL	hsl(242, 60%, 49%)
HSV	hsv(242, 75%, 79%)
CMYK	cmyk(72.6%, 74.6%, 0%, 21.2%)
CIE-LAB	lab(32.69, 49.70, -76.27)
CIE-LCH	lch(32.69, 91.03, 303.09°)
OKLab	oklab(44.11% 0.0142 -0.2206)
OKLCH	oklch(44.11% 0.221 273.7)
XYZ	xyz(13.2985, 7.3956, 55.9737)
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

#3733C9 #C5C933

analogous

#337AC9 #3733C9 #8233C9

triadic

#3733C9 #C93733 #33C937

tetradic

#3733C9 #C9337A #C5C933 #33C982

square

#3733C9 #C9337A #C5C933 #33C982

split-complementary

#3733C9 #C98233 #7AC933

monochromatic

#1C1A67 #2A2798 #3733C9 #6562D7 #9593E4

Accessibility & contrast

On white

8.47

#3733C9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#3733C9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733C9

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733C9	#FFFFFF	#000000	##FFFFFF
##3733C9	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)

#0054CD

Deuteranopia (green-blind)

#0046C6

Tritanopia (blue-blind)

#005F7C

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3733c9;
/* rgb */ color: rgb(55, 51, 201);
/* oklch */ color: oklch(44.1% 0.221 273.7);

Tailwind

colors: {
  custom: {
    50: '#846ddb',
    500: '#3733c9',
    950: '#000000',
  },
}

SCSS

$custom: #3733c9;
$custom-light: #846ddb;
$custom-dark: #000000;

JSON

{
  "hex": "#3733c9",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 201
  },
  "hsl": {
    "h": 241.6,
    "s": 59.524,
    "l": 49.412
  },
  "oklch": {
    "l": 0.44106,
    "c": 0.22109,
    "h": 273.7
  },
  "luminance": 0.07397
}

Semantic roles & 50–950 ramp

primary

#3733C9

secondary

#CDCF89

accent

#E345DE

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0715

muted

#7E7A83

Preview Lab

Preview with #3733C9

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

Preview Lab → · Contrast checker → · Palette generator →