#3639CB#3639CB

#3639CB is a mid, highly saturated blue. Relative luminance 0.080; OKLCH L 45.1% C 0.218 H 272.6°. Best body text is #FFFFFF at 8.06:1 contrast (WCAG AA passes).

Color values

HEX	#3639CB
RGB	rgb(54, 57, 203)
HSL	hsl(239, 59%, 50%)
HSV	hsv(239, 73%, 80%)
CMYK	cmyk(73.4%, 71.9%, 0%, 20.4%)
CIE-LAB	lab(34.03, 46.91, -75.23)
CIE-LCH	lch(34.03, 88.66, 301.95°)
OKLab	oklab(45.1% 0.0098 -0.2177)
OKLCH	oklch(45.1% 0.218 272.6)
XYZ	xyz(13.7603, 8.0209, 57.3113)
Luminance	0.0802 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 3.35

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3639CB #CBC836

analogous

#3683CB #3639CB #7D36CB

triadic

#3639CB #CB3639 #39CB36

tetradic

#3639CB #CB3683 #CBC836 #36CB7D

square

#3639CB #CB3683 #CBC836 #36CB7D

split-complementary

#3639CB #CB7D36 #83CB36

monochromatic

#1C1D6B #282B9C #3639CB #6769D8 #9799E4

Accessibility & contrast

On white

8.06

#3639CB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#3639CB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3639CB

8.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3639CB	#FFFFFF	#000000	##FFFFFF
##3639CB	1.00	8.06	2.60	8.06
#FFFFFF	8.06	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057CF

Deuteranopia (green-blind)

#0049C8

Tritanopia (blue-blind)

#00627E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3639cb;
/* rgb */ color: rgb(54, 57, 203);
/* oklch */ color: oklch(45.1% 0.218 272.6);

Tailwind

colors: {
  custom: {
    50: '#8471dc',
    500: '#3639cb',
    950: '#000000',
  },
}

SCSS

$custom: #3639cb;
$custom-light: #8471dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3639cb",
  "rgb": {
    "r": 54,
    "g": 57,
    "b": 203
  },
  "hsl": {
    "h": 238.792,
    "s": 58.893,
    "l": 50.392
  },
  "oklch": {
    "l": 0.451,
    "c": 0.2179,
    "h": 272.6
  },
  "luminance": 0.08022
}

Semantic roles & 50–950 ramp

primary

#3639CB

secondary

#D0CE8D

accent

#DF46E2

background

#F8F6FD

surface

#F0ECFB

border

#CBC7D4

text

#0D0815

muted

#7D7B83

Preview Lab

Preview with #3639CB

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

Preview Lab → · Contrast checker → · Palette generator →