#3737BD#3737BD

#3737BD is a dark, highly saturated blue. Relative luminance 0.072; OKLCH L 43.5% C 0.203 H 274.0°. Best body text is #FFFFFF at 8.59:1 contrast (WCAG AA passes).

Color values

HEX	#3737BD
RGB	rgb(55, 55, 189)
HSL	hsl(240, 55%, 48%)
HSV	hsv(240, 71%, 74%)
CMYK	cmyk(70.9%, 70.9%, 0%, 25.9%)
CIE-LAB	lab(32.30, 43.52, -69.88)
CIE-LCH	lch(32.30, 82.32, 301.91°)
OKLab	oklab(43.47% 0.0142 -0.202)
OKLCH	oklch(43.47% 0.203 274)
XYZ	xyz(12.1240, 7.2175, 48.8884)
Luminance	0.0722 (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

#3737BD #BDBD37

analogous

#377ABD #3737BD #7A37BD

triadic

#3737BD #BD3737 #37BD37

tetradic

#3737BD #BD377A #BDBD37 #37BD7A

square

#3737BD #BD377A #BDBD37 #37BD7A

split-complementary

#3737BD #BD7A37 #7ABD37

monochromatic

#1B1B5E #29298E #3737BD #6060D1 #9090DF

Accessibility & contrast

On white

8.59

#3737BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#3737BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3737BD

8.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3737BD	#FFFFFF	#000000	##FFFFFF
##3737BD	1.00	8.59	2.44	8.59
#FFFFFF	8.59	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052C1

Deuteranopia (green-blind)

#0046BB

Tritanopia (blue-blind)

#005C76

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3737bd;
/* rgb */ color: rgb(55, 55, 189);
/* oklch */ color: oklch(43.5% 0.203 274.0);

Tailwind

colors: {
  custom: {
    50: '#816fd2',
    500: '#3737bd',
    950: '#000000',
  },
}

SCSS

$custom: #3737bd;
$custom-light: #816fd2;
$custom-dark: #000000;

JSON

{
  "hex": "#3737bd",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 189
  },
  "hsl": {
    "h": 240,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.43466,
    "c": 0.20254,
    "h": 274
  },
  "luminance": 0.07219
}

Semantic roles & 50–950 ramp

primary

#3737BD

secondary

#C9C986

accent

#DE4ADE

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3737BD

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

Preview Lab → · Contrast checker → · Palette generator →