#3733BD#3733BD

#3733BD is a dark, highly saturated blue. Relative luminance 0.069; OKLCH L 42.9% C 0.207 H 274.6°. Best body text is #FFFFFF at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#3733BD
RGB	rgb(55, 51, 189)
HSL	hsl(242, 58%, 47%)
HSV	hsv(242, 73%, 74%)
CMYK	cmyk(70.9%, 73%, 0%, 25.9%)
CIE-LAB	lab(31.47, 45.82, -71.24)
CIE-LCH	lch(31.47, 84.70, 302.75°)
OKLab	oklab(42.88% 0.0164 -0.206)
OKLCH	oklch(42.88% 0.207 274.6)
XYZ	xyz(11.9416, 6.8528, 48.8276)
Luminance	0.0685 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 4.07

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3733BD #B9BD33

analogous

#3374BD #3733BD #7C33BD

triadic

#3733BD #BD3733 #33BD37

tetradic

#3733BD #BD3374 #B9BD33 #33BD7C

square

#3733BD #BD3374 #B9BD33 #33BD7C

split-complementary

#3733BD #BD7C33 #74BD33

monochromatic

#1B195D #29268D #3733BD #5E5BD3 #8D8BE0

Accessibility & contrast

On white

8.86

#3733BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#3733BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733BD

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733BD	#FFFFFF	#000000	##FFFFFF
##3733BD	1.00	8.86	2.37	8.86
#FFFFFF	8.86	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050C1

Deuteranopia (green-blind)

#0044BB

Tritanopia (blue-blind)

#005A75

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3733bd;
/* rgb */ color: rgb(55, 51, 189);
/* oklch */ color: oklch(42.9% 0.207 274.6);

Tailwind

colors: {
  custom: {
    50: '#816cd2',
    500: '#3733bd',
    950: '#000000',
  },
}

SCSS

$custom: #3733bd;
$custom-light: #816cd2;
$custom-dark: #000000;

JSON

{
  "hex": "#3733bd",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 189
  },
  "hsl": {
    "h": 241.739,
    "s": 57.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.42875,
    "c": 0.20665,
    "h": 274.6
  },
  "luminance": 0.06854
}

Semantic roles & 50–950 ramp

primary

#3733BD

secondary

#C8CA82

accent

#E147DC

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3733BD

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

Preview Lab → · Contrast checker → · Palette generator →