#3737BA#3737BA

#3737BA is a dark, vivid blue. Relative luminance 0.071; OKLCH L 43.2% C 0.199 H 274.2°. Best body text is #FFFFFF at 8.68:1 contrast (WCAG AA passes).

Color values

HEX	#3737BA
RGB	rgb(55, 55, 186)
HSL	hsl(240, 54%, 47%)
HSV	hsv(240, 70%, 73%)
CMYK	cmyk(70.4%, 70.4%, 0%, 27.1%)
CIE-LAB	lab(32.01, 42.51, -68.58)
CIE-LCH	lch(32.01, 80.69, 301.79°)
OKLab	oklab(43.17% 0.0146 -0.1983)
OKLCH	oklch(43.17% 0.199 274.2)
XYZ	xyz(11.8017, 7.0886, 47.1911)
Luminance	0.0709 (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

#3737BA #BABA37

analogous

#3779BA #3737BA #7937BA

triadic

#3737BA #BA3737 #37BA37

tetradic

#3737BA #BA3779 #BABA37 #37BA79

square

#3737BA #BA3779 #BABA37 #37BA79

split-complementary

#3737BA #BA7937 #79BA37

monochromatic

#1B1B5C #29298B #3737BA #5F5FD0 #8E8EDE

Accessibility & contrast

On white

8.68

#3737BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#3737BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3737BA

8.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3737BA	#FFFFFF	#000000	##FFFFFF
##3737BA	1.00	8.68	2.42	8.68
#FFFFFF	8.68	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BE

Deuteranopia (green-blind)

#0045B8

Tritanopia (blue-blind)

#005B74

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3737ba;
/* rgb */ color: rgb(55, 55, 186);
/* oklch */ color: oklch(43.2% 0.199 274.2);

Tailwind

colors: {
  custom: {
    50: '#806fd0',
    500: '#3737ba',
    950: '#000000',
  },
}

SCSS

$custom: #3737ba;
$custom-light: #806fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3737ba",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 186
  },
  "hsl": {
    "h": 240,
    "s": 54.357,
    "l": 47.255
  },
  "oklch": {
    "l": 0.43171,
    "c": 0.1988,
    "h": 274.2
  },
  "luminance": 0.0709
}

Semantic roles & 50–950 ramp

primary

#3737BA

secondary

#C8C885

accent

#DE4ADE

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3737BA

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

Preview Lab → · Contrast checker → · Palette generator →