#3663D0#3663D0

#3663D0 is a mid, vivid blue. Relative luminance 0.143; OKLCH L 53.0% C 0.176 H 264.3°. Best body text is #FFFFFF at 5.45:1 contrast (WCAG AA passes).

Color values

HEX	#3663D0
RGB	rgb(54, 99, 208)
HSL	hsl(222, 62%, 51%)
HSV	hsv(222, 74%, 82%)
CMYK	cmyk(74%, 52.4%, 0%, 18.4%)
CIE-LAB	lab(44.60, 22.49, -60.83)
CIE-LCH	lch(44.60, 64.86, 290.29°)
OKLab	oklab(53.04% -0.0175 -0.1751)
OKLCH	oklch(53.04% 0.176 264.3)
XYZ	xyz(17.3643, 14.2601, 61.4996)
Luminance	0.1426 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663D0 #D0A336

analogous

#36B0D0 #3663D0 #5636D0

triadic

#3663D0 #D03663 #63D036

tetradic

#3663D0 #D036B0 #D0A336 #36D056

square

#3663D0 #D036B0 #D0A336 #36D056

split-complementary

#3663D0 #D05636 #B0D036

monochromatic

#1A3471 #264AA3 #3663D0 #6889DC #99B0E7

Accessibility & contrast

On white

5.45

#3663D0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.85

#3663D0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663D0

5.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663D0	#FFFFFF	#000000	##FFFFFF
##3663D0	1.00	5.45	3.85	5.45
#FFFFFF	5.45	1.00	21.00	1.00
#000000	3.85	21.00	1.00	21.00
##FFFFFF	5.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1571D4

Deuteranopia (green-blind)

#0063CE

Tritanopia (blue-blind)

#007D90

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3663d0;
/* rgb */ color: rgb(54, 99, 208);
/* oklch */ color: oklch(53.0% 0.176 264.3);

Tailwind

colors: {
  custom: {
    50: '#828edf',
    500: '#3663d0',
    950: '#000000',
  },
}

SCSS

$custom: #3663d0;
$custom-light: #828edf;
$custom-dark: #000000;

JSON

{
  "hex": "#3663d0",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 208
  },
  "hsl": {
    "h": 222.468,
    "s": 62.097,
    "l": 51.373
  },
  "oklch": {
    "l": 0.53041,
    "c": 0.176,
    "h": 264.3
  },
  "luminance": 0.14262
}

Semantic roles & 50–950 ramp

primary

#3663D0

secondary

#D3BF8F

accent

#B643E5

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3663D0

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

Preview Lab → · Contrast checker → · Palette generator →