#3639B8#3639B8

#3639B8 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.2% C 0.194 H 273.7°. Best body text is #FFFFFF at 8.63:1 contrast (WCAG AA passes).

Color values

HEX	#3639B8
RGB	rgb(54, 57, 184)
HSL	hsl(239, 55%, 47%)
HSV	hsv(239, 71%, 72%)
CMYK	cmyk(70.7%, 69%, 0%, 27.8%)
CIE-LAB	lab(32.19, 40.53, -67.10)
CIE-LCH	lch(32.19, 78.39, 301.13°)
OKLab	oklab(43.23% 0.0125 -0.194)
OKLCH	oklch(43.23% 0.194 273.7)
XYZ	xyz(11.6333, 7.1701, 46.1090)
Luminance	0.0717 (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

#3639B8 #B8B536

analogous

#367AB8 #3639B8 #7436B8

triadic

#3639B8 #B83639 #39B836

tetradic

#3639B8 #B8367A #B8B536 #36B874

square

#3639B8 #B8367A #B8B536 #36B874

split-complementary

#3639B8 #B87436 #7AB836

monochromatic

#1A1C59 #282A89 #3639B8 #5C5FCF #8B8DDD

Accessibility & contrast

On white

8.63

#3639B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#3639B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3639B8

8.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3639B8	#FFFFFF	#000000	##FFFFFF
##3639B8	1.00	8.63	2.43	8.63
#FFFFFF	8.63	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BC

Deuteranopia (green-blind)

#0046B6

Tritanopia (blue-blind)

#005C74

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3639b8;
/* rgb */ color: rgb(54, 57, 184);
/* oklch */ color: oklch(43.2% 0.194 273.7);

Tailwind

colors: {
  custom: {
    50: '#7f70ce',
    500: '#3639b8',
    950: '#000000',
  },
}

SCSS

$custom: #3639b8;
$custom-light: #7f70ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3639b8",
  "rgb": {
    "r": 54,
    "g": 57,
    "b": 184
  },
  "hsl": {
    "h": 238.615,
    "s": 54.622,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43229,
    "c": 0.19436,
    "h": 273.7
  },
  "luminance": 0.07171
}

Semantic roles & 50–950 ramp

primary

#3639B8

secondary

#C7C682

accent

#DB4ADE

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3639B8

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

Preview Lab → · Contrast checker → · Palette generator →