#3663C4#3663C4

#3663C4 is a mid, vivid blue. Relative luminance 0.137; OKLCH L 52.2% C 0.160 H 263.2°. Best body text is #FFFFFF at 5.62:1 contrast (WCAG AA passes).

Color values

HEX	#3663C4
RGB	rgb(54, 99, 196)
HSL	hsl(221, 57%, 49%)
HSV	hsv(221, 72%, 77%)
CMYK	cmyk(72.4%, 49.5%, 0%, 23.1%)
CIE-LAB	lab(43.79, 18.05, -55.24)
CIE-LCH	lch(43.79, 58.12, 288.09°)
OKLab	oklab(52.16% -0.0188 -0.1587)
OKLCH	oklch(52.16% 0.16 263.2)
XYZ	xyz(15.9434, 13.6918, 54.0164)
Luminance	0.1369 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663C4 #C49736

analogous

#36AAC4 #3663C4 #5036C4

triadic

#3663C4 #C43663 #63C436

tetradic

#3663C4 #C436AA #C49736 #36C450

square

#3663C4 #C436AA #C49736 #36C450

split-complementary

#3663C4 #C45036 #AAC436

monochromatic

#1C3364 #294B94 #3663C4 #6387D4 #93ACE1

Accessibility & contrast

On white

5.62

#3663C4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.74

#3663C4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663C4

5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663C4	#FFFFFF	#000000	##FFFFFF
##3663C4	1.00	5.62	3.74	5.62
#FFFFFF	5.62	1.00	21.00	1.00
#000000	3.74	21.00	1.00	21.00
##FFFFFF	5.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B6EC8

Deuteranopia (green-blind)

#0061C2

Tritanopia (blue-blind)

#007A8A

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3663c4;
/* rgb */ color: rgb(54, 99, 196);
/* oklch */ color: oklch(52.2% 0.160 263.2);

Tailwind

colors: {
  custom: {
    50: '#7f8ed6',
    500: '#3663c4',
    950: '#000000',
  },
}

SCSS

$custom: #3663c4;
$custom-light: #7f8ed6;
$custom-dark: #000000;

JSON

{
  "hex": "#3663c4",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 196
  },
  "hsl": {
    "h": 220.986,
    "s": 56.8,
    "l": 49.02
  },
  "oklch": {
    "l": 0.5216,
    "c": 0.15978,
    "h": 263.2
  },
  "luminance": 0.13693
}

Semantic roles & 50–950 ramp

primary

#3663C4

secondary

#CCB789

accent

#B048E0

background

#F8F8FD

surface

#F0F0FA

border

#CBCBD3

text

#0B0C14

muted

#7C7D83

Preview Lab

Preview with #3663C4

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

Preview Lab → · Contrast checker → · Palette generator →