#3733D0#3733D0

#3733D0 is a dark, highly saturated blue. Relative luminance 0.077; OKLCH L 44.8% C 0.229 H 273.2°. Best body text is #FFFFFF at 8.25:1 contrast (WCAG AA passes).

Color values

HEX	#3733D0
RGB	rgb(55, 51, 208)
HSL	hsl(242, 63%, 51%)
HSV	hsv(242, 75%, 82%)
CMYK	cmyk(73.6%, 75.5%, 0%, 18.4%)
CIE-LAB	lab(33.42, 51.93, -79.13)
CIE-LCH	lch(33.42, 94.65, 303.27°)
OKLab	oklab(44.84% 0.0128 -0.229)
OKLCH	oklch(44.84% 0.229 273.2)
XYZ	xyz(14.1407, 7.7325, 60.4096)
Luminance	0.0773 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blurple

#5539CC

ΔE00 3.51

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3733D0 #CCD033

analogous

#337DD0 #3733D0 #8633D0

triadic

#3733D0 #D03733 #33D037

tetradic

#3733D0 #D0337D #CCD033 #33D086

square

#3733D0 #D0337D #CCD033 #33D086

split-complementary

#3733D0 #D08633 #7DD033

monochromatic

#1C1A6F #2825A1 #3733D0 #6865DB #9996E7

Accessibility & contrast

On white

8.25

#3733D0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#3733D0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733D0

8.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733D0	#FFFFFF	#000000	##FFFFFF
##3733D0	1.00	8.25	2.55	8.25
#FFFFFF	8.25	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056D4

Deuteranopia (green-blind)

#0047CD

Tritanopia (blue-blind)

#006280

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3733d0;
/* rgb */ color: rgb(55, 51, 208);
/* oklch */ color: oklch(44.8% 0.229 273.2);

Tailwind

colors: {
  custom: {
    50: '#866de0',
    500: '#3733d0',
    950: '#000000',
  },
}

SCSS

$custom: #3733d0;
$custom-light: #866de0;
$custom-dark: #000000;

JSON

{
  "hex": "#3733d0",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 208
  },
  "hsl": {
    "h": 241.529,
    "s": 62.55,
    "l": 50.784
  },
  "oklch": {
    "l": 0.44836,
    "c": 0.22934,
    "h": 273.2
  },
  "luminance": 0.07734
}

Semantic roles & 50–950 ramp

primary

#3733D0

secondary

#D0D28D

accent

#E642E1

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0715

muted

#7E7A83

Preview Lab

Preview with #3733D0

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

Preview Lab → · Contrast checker → · Palette generator →