#3639B4#3639B4

#3639B4 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.8% C 0.189 H 273.9°. Best body text is #FFFFFF at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#3639B4
RGB	rgb(54, 57, 180)
HSL	hsl(239, 54%, 46%)
HSV	hsv(239, 70%, 71%)
CMYK	cmyk(70%, 68.3%, 0%, 29.4%)
CIE-LAB	lab(31.82, 39.16, -65.34)
CIE-LCH	lch(31.82, 76.18, 300.94°)
OKLab	oklab(42.85% 0.013 -0.1888)
OKLCH	oklch(42.85% 0.189 273.9)
XYZ	xyz(11.2199, 7.0047, 43.9319)
Luminance	0.0701 (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

#3639B4 #B4B136

analogous

#3678B4 #3639B4 #7236B4

triadic

#3639B4 #B43639 #39B436

tetradic

#3639B4 #B43678 #B4B136 #36B472

square

#3639B4 #B43678 #B4B136 #36B472

split-complementary

#3639B4 #B47236 #78B436

monochromatic

#1A1B56 #282A85 #3639B4 #5A5DCD #898BDC

Accessibility & contrast

On white

8.75

#3639B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#3639B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3639B4

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3639B4	#FFFFFF	#000000	##FFFFFF
##3639B4	1.00	8.75	2.40	8.75
#FFFFFF	8.75	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B8

Deuteranopia (green-blind)

#0045B2

Tritanopia (blue-blind)

#005A72

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3639b4;
/* rgb */ color: rgb(54, 57, 180);
/* oklch */ color: oklch(42.8% 0.189 273.9);

Tailwind

colors: {
  custom: {
    50: '#7f70cc',
    500: '#3639b4',
    950: '#000000',
  },
}

SCSS

$custom: #3639b4;
$custom-light: #7f70cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3639b4",
  "rgb": {
    "r": 54,
    "g": 57,
    "b": 180
  },
  "hsl": {
    "h": 238.571,
    "s": 53.846,
    "l": 45.882
  },
  "oklch": {
    "l": 0.42845,
    "c": 0.18927,
    "h": 273.9
  },
  "luminance": 0.07006
}

Semantic roles & 50–950 ramp

primary

#3639B4

secondary

#C6C480

accent

#DA4BDD

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3639B4

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

Preview Lab → · Contrast checker → · Palette generator →