#3663D4#3663D4

#3663D4 is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.3% C 0.181 H 264.6°. Best body text is #FFFFFF at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#3663D4
RGB	rgb(54, 99, 212)
HSL	hsl(223, 65%, 52%)
HSV	hsv(223, 75%, 83%)
CMYK	cmyk(74.5%, 53.3%, 0%, 16.9%)
CIE-LAB	lab(44.88, 23.97, -62.67)
CIE-LCH	lch(44.88, 67.09, 290.93°)
OKLab	oklab(53.34% -0.0171 -0.1805)
OKLCH	oklch(53.34% 0.181 264.6)
XYZ	xyz(17.8626, 14.4594, 64.1241)
Luminance	0.1446 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663D4 #D4A736

analogous

#36B2D4 #3663D4 #5836D4

triadic

#3663D4 #D43663 #63D436

tetradic

#3663D4 #D436B2 #D4A736 #36D458

square

#3663D4 #D436B2 #D4A736 #36D458

split-complementary

#3663D4 #D45836 #B2D436

monochromatic

#193476 #244AA9 #3663D4 #688ADF #9BB1EA

Accessibility & contrast

On white

5.40

#3663D4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.89

#3663D4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663D4

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663D4	#FFFFFF	#000000	##FFFFFF
##3663D4	1.00	5.40	3.89	5.40
#FFFFFF	5.40	1.00	21.00	1.00
#000000	3.89	21.00	1.00	21.00
##FFFFFF	5.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0772D8

Deuteranopia (green-blind)

#0063D2

Tritanopia (blue-blind)

#007E92

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3663d4;
/* rgb */ color: rgb(54, 99, 212);
/* oklch */ color: oklch(53.3% 0.181 264.6);

Tailwind

colors: {
  custom: {
    50: '#838ee2',
    500: '#3663d4',
    950: '#000000',
  },
}

SCSS

$custom: #3663d4;
$custom-light: #838ee2;
$custom-dark: #000000;

JSON

{
  "hex": "#3663d4",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 212
  },
  "hsl": {
    "h": 222.911,
    "s": 64.754,
    "l": 52.157
  },
  "oklch": {
    "l": 0.53343,
    "c": 0.18133,
    "h": 264.6
  },
  "luminance": 0.14461
}

Semantic roles & 50–950 ramp

primary

#3663D4

secondary

#D5C290

accent

#B840E8

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3663D4

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

Preview Lab → · Contrast checker → · Palette generator →