#3639BC#3639BC

#3639BC is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.6% C 0.199 H 273.4°. Best body text is #FFFFFF at 8.51:1 contrast (WCAG AA passes).

Color values

HEX	#3639BC
RGB	rgb(54, 57, 188)
HSL	hsl(239, 55%, 47%)
HSV	hsv(239, 71%, 74%)
CMYK	cmyk(71.3%, 69.7%, 0%, 26.3%)
CIE-LAB	lab(32.57, 41.89, -68.84)
CIE-LCH	lch(32.57, 80.59, 301.32°)
OKLab	oklab(43.62% 0.012 -0.199)
OKLCH	oklch(43.62% 0.199 273.4)
XYZ	xyz(12.0585, 7.3402, 48.3485)
Luminance	0.0734 (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

#3639BC #BCB936

analogous

#367CBC #3639BC #7636BC

triadic

#3639BC #BC3639 #39BC36

tetradic

#3639BC #BC367C #BCB936 #36BC76

square

#3639BC #BC367C #BCB936 #36BC76

split-complementary

#3639BC #BC7636 #7CBC36

monochromatic

#1B1C5D #282B8C #3639BC #5E61D1 #8E90DF

Accessibility & contrast

On white

8.51

#3639BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#3639BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3639BC

8.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3639BC	#FFFFFF	#000000	##FFFFFF
##3639BC	1.00	8.51	2.47	8.51
#FFFFFF	8.51	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053C0

Deuteranopia (green-blind)

#0046BA

Tritanopia (blue-blind)

#005D76

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3639bc;
/* rgb */ color: rgb(54, 57, 188);
/* oklch */ color: oklch(43.6% 0.199 273.4);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#3639bc",
  "rgb": {
    "r": 54,
    "g": 57,
    "b": 188
  },
  "hsl": {
    "h": 238.657,
    "s": 55.372,
    "l": 47.451
  },
  "oklch": {
    "l": 0.43616,
    "c": 0.19941,
    "h": 273.4
  },
  "luminance": 0.07341
}

Semantic roles & 50–950 ramp

primary

#3639BC

secondary

#C9C885

accent

#DB49DF

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3639BC

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

Preview Lab → · Contrast checker → · Palette generator →