#3639B9#3639B9

#3639B9 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.3% C 0.196 H 273.6°. Best body text is #FFFFFF at 8.60:1 contrast (WCAG AA passes).

Color values

HEX	#3639B9
RGB	rgb(54, 57, 185)
HSL	hsl(239, 55%, 47%)
HSV	hsv(239, 71%, 73%)
CMYK	cmyk(70.8%, 69.2%, 0%, 27.5%)
CIE-LAB	lab(32.29, 40.87, -67.54)
CIE-LCH	lch(32.29, 78.94, 301.18°)
OKLab	oklab(43.33% 0.0124 -0.1952)
OKLCH	oklch(43.33% 0.196 273.6)
XYZ	xyz(11.7385, 7.2122, 46.6630)
Luminance	0.0721 (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

#3639B9 #B9B636

analogous

#367BB9 #3639B9 #7536B9

triadic

#3639B9 #B93639 #39B936

tetradic

#3639B9 #B9367B #B9B636 #36B975

square

#3639B9 #B9367B #B9B636 #36B975

split-complementary

#3639B9 #B97536 #7BB936

monochromatic

#1A1C5A #282A8A #3639B9 #5D5FD0 #8C8EDD

Accessibility & contrast

On white

8.60

#3639B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#3639B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3639B9

8.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3639B9	#FFFFFF	#000000	##FFFFFF
##3639B9	1.00	8.60	2.44	8.60
#FFFFFF	8.60	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BD

Deuteranopia (green-blind)

#0046B7

Tritanopia (blue-blind)

#005C74

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3639b9;
/* rgb */ color: rgb(54, 57, 185);
/* oklch */ color: oklch(43.3% 0.196 273.6);

Tailwind

colors: {
  custom: {
    50: '#8070cf',
    500: '#3639b9',
    950: '#000000',
  },
}

SCSS

$custom: #3639b9;
$custom-light: #8070cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3639b9",
  "rgb": {
    "r": 54,
    "g": 57,
    "b": 185
  },
  "hsl": {
    "h": 238.626,
    "s": 54.812,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43325,
    "c": 0.19563,
    "h": 273.6
  },
  "luminance": 0.07213
}

Semantic roles & 50–950 ramp

primary

#3639B9

secondary

#C8C683

accent

#DB4ADE

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3639B9

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

Preview Lab → · Contrast checker → · Palette generator →