#3639BB#3639BB

#3639BB is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.5% C 0.198 H 273.5°. Best body text is #FFFFFF at 8.54:1 contrast (WCAG AA passes).

Color values

HEX	#3639BB
RGB	rgb(54, 57, 187)
HSL	hsl(239, 55%, 47%)
HSV	hsv(239, 71%, 73%)
CMYK	cmyk(71.1%, 69.5%, 0%, 26.7%)
CIE-LAB	lab(32.47, 41.55, -68.41)
CIE-LCH	lch(32.47, 80.04, 301.27°)
OKLab	oklab(43.52% 0.0121 -0.1978)
OKLCH	oklch(43.52% 0.198 273.5)
XYZ	xyz(11.9511, 7.2972, 47.7827)
Luminance	0.0730 (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

#3639BB #BBB836

analogous

#367BBB #3639BB #7636BB

triadic

#3639BB #BB3639 #39BB36

tetradic

#3639BB #BB367B #BBB836 #36BB76

square

#3639BB #BB367B #BBB836 #36BB76

split-complementary

#3639BB #BB7636 #7BBB36

monochromatic

#1B1C5C #282B8C #3639BB #5E60D0 #8D8FDE

Accessibility & contrast

On white

8.54

#3639BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#3639BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3639BB

8.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3639BB	#FFFFFF	#000000	##FFFFFF
##3639BB	1.00	8.54	2.46	8.54
#FFFFFF	8.54	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BF

Deuteranopia (green-blind)

#0046B9

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3639bb;
/* rgb */ color: rgb(54, 57, 187);
/* oklch */ color: oklch(43.5% 0.198 273.5);

Tailwind

colors: {
  custom: {
    50: '#8070d1',
    500: '#3639bb',
    950: '#000000',
  },
}

SCSS

$custom: #3639bb;
$custom-light: #8070d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3639bb",
  "rgb": {
    "r": 54,
    "g": 57,
    "b": 187
  },
  "hsl": {
    "h": 238.647,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.43519,
    "c": 0.19815,
    "h": 273.5
  },
  "luminance": 0.07298
}

Semantic roles & 50–950 ramp

primary

#3639BB

secondary

#C9C784

accent

#DB49DF

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3639BB

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

Preview Lab → · Contrast checker → · Palette generator →