#3638CB#3638CB

#3638CB is a dark, highly saturated blue. Relative luminance 0.079; OKLCH L 45.0% C 0.219 H 272.7°. Best body text is #FFFFFF at 8.12:1 contrast (WCAG AA passes).

Color values

HEX	#3638CB
RGB	rgb(54, 56, 203)
HSL	hsl(239, 59%, 50%)
HSV	hsv(239, 73%, 80%)
CMYK	cmyk(73.4%, 72.4%, 0%, 20.4%)
CIE-LAB	lab(33.82, 47.48, -75.57)
CIE-LCH	lch(33.82, 89.25, 302.14°)
OKLab	oklab(44.95% 0.0103 -0.2186)
OKLCH	oklch(44.95% 0.219 272.7)
XYZ	xyz(13.7114, 7.9230, 57.2950)
Luminance	0.0792 (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

#3638CB #CBC936

analogous

#3682CB #3638CB #7F36CB

triadic

#3638CB #CB3638 #38CB36

tetradic

#3638CB #CB3682 #CBC936 #36CB7F

square

#3638CB #CB3682 #CBC936 #36CB7F

split-complementary

#3638CB #CB7F36 #82CB36

monochromatic

#1C1D6B #282A9C #3638CB #6768D8 #9798E4

Accessibility & contrast

On white

8.12

#3638CB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#3638CB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3638CB

8.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3638CB	#FFFFFF	#000000	##FFFFFF
##3638CB	1.00	8.12	2.58	8.12
#FFFFFF	8.12	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057CF

Deuteranopia (green-blind)

#0048C8

Tritanopia (blue-blind)

#00627E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3638cb;
/* rgb */ color: rgb(54, 56, 203);
/* oklch */ color: oklch(45.0% 0.219 272.7);

Tailwind

colors: {
  custom: {
    50: '#8470dc',
    500: '#3638cb',
    950: '#000000',
  },
}

SCSS

$custom: #3638cb;
$custom-light: #8470dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3638cb",
  "rgb": {
    "r": 54,
    "g": 56,
    "b": 203
  },
  "hsl": {
    "h": 239.195,
    "s": 58.893,
    "l": 50.392
  },
  "oklch": {
    "l": 0.44954,
    "c": 0.21889,
    "h": 272.7
  },
  "luminance": 0.07924
}

Semantic roles & 50–950 ramp

primary

#3638CB

secondary

#D0CF8D

accent

#E046E2

background

#F8F6FD

surface

#F0ECFB

border

#CBC7D4

text

#0D0715

muted

#7D7A83

Preview Lab

Preview with #3638CB

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

Preview Lab → · Contrast checker → · Palette generator →