#3733BA#3733BA

#3733BA is a dark, highly saturated blue. Relative luminance 0.067; OKLCH L 42.6% C 0.203 H 274.8°. Best body text is #FFFFFF at 8.96:1 contrast (WCAG AA passes).

Color values

HEX	#3733BA
RGB	rgb(55, 51, 186)
HSL	hsl(242, 57%, 46%)
HSV	hsv(242, 73%, 73%)
CMYK	cmyk(70.4%, 72.6%, 0%, 27.1%)
CIE-LAB	lab(31.17, 44.83, -69.96)
CIE-LCH	lch(31.17, 83.10, 302.65°)
OKLab	oklab(42.57% 0.017 -0.2023)
OKLCH	oklch(42.57% 0.203 274.8)
XYZ	xyz(11.6194, 6.7239, 47.1304)
Luminance	0.0673 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 3.82

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3733BA #B6BA33

analogous

#3373BA #3733BA #7B33BA

triadic

#3733BA #BA3733 #33BA37

tetradic

#3733BA #BA3373 #B6BA33 #33BA7B

square

#3733BA #BA3373 #B6BA33 #33BA7B

split-complementary

#3733BA #BA7B33 #73BA33

monochromatic

#1B195A #29268A #3733BA #5C59D1 #8B89DF

Accessibility & contrast

On white

8.96

#3733BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#3733BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733BA

8.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733BA	#FFFFFF	#000000	##FFFFFF
##3733BA	1.00	8.96	2.35	8.96
#FFFFFF	8.96	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FBE

Deuteranopia (green-blind)

#0043B8

Tritanopia (blue-blind)

#005973

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3733ba;
/* rgb */ color: rgb(55, 51, 186);
/* oklch */ color: oklch(42.6% 0.203 274.8);

Tailwind

colors: {
  custom: {
    50: '#816cd0',
    500: '#3733ba',
    950: '#000000',
  },
}

SCSS

$custom: #3733ba;
$custom-light: #816cd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3733ba",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 186
  },
  "hsl": {
    "h": 241.778,
    "s": 56.962,
    "l": 46.471
  },
  "oklch": {
    "l": 0.42572,
    "c": 0.20298,
    "h": 274.8
  },
  "luminance": 0.06725
}

Semantic roles & 50–950 ramp

primary

#3733BA

secondary

#C6C980

accent

#E048DC

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3733BA

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

Preview Lab → · Contrast checker → · Palette generator →