#3663C3#3663C3

#3663C3 is a mid, vivid blue. Relative luminance 0.136; OKLCH L 52.1% C 0.158 H 263.1°. Best body text is #FFFFFF at 5.63:1 contrast (WCAG AA passes).

Color values

HEX	#3663C3
RGB	rgb(54, 99, 195)
HSL	hsl(221, 57%, 49%)
HSV	hsv(221, 72%, 76%)
CMYK	cmyk(72.3%, 49.2%, 0%, 23.5%)
CIE-LAB	lab(43.72, 17.68, -54.77)
CIE-LCH	lch(43.72, 57.55, 287.89°)
OKLab	oklab(52.09% -0.0189 -0.1573)
OKLCH	oklch(52.09% 0.158 263.1)
XYZ	xyz(15.8300, 13.6464, 53.4189)
Luminance	0.1365 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663C3 #C39636

analogous

#36AAC3 #3663C3 #5036C3

triadic

#3663C3 #C33663 #63C336

tetradic

#3663C3 #C336AA #C39636 #36C350

square

#3663C3 #C336AA #C39636 #36C350

split-complementary

#3663C3 #C35036 #AAC336

monochromatic

#1B3263 #294B93 #3663C3 #6387D4 #92ACE1

Accessibility & contrast

On white

5.63

#3663C3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.73

#3663C3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663C3

5.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663C3	#FFFFFF	#000000	##FFFFFF
##3663C3	1.00	5.63	3.73	5.63
#FFFFFF	5.63	1.00	21.00	1.00
#000000	3.73	21.00	1.00	21.00
##FFFFFF	5.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C6EC7

Deuteranopia (green-blind)

#0061C1

Tritanopia (blue-blind)

#007A8A

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3663c3;
/* rgb */ color: rgb(54, 99, 195);
/* oklch */ color: oklch(52.1% 0.158 263.1);

Tailwind

colors: {
  custom: {
    50: '#7f8ed6',
    500: '#3663c3',
    950: '#000000',
  },
}

SCSS

$custom: #3663c3;
$custom-light: #7f8ed6;
$custom-dark: #000000;

JSON

{
  "hex": "#3663c3",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 195
  },
  "hsl": {
    "h": 220.851,
    "s": 56.627,
    "l": 48.824
  },
  "oklch": {
    "l": 0.52089,
    "c": 0.15843,
    "h": 263.1
  },
  "luminance": 0.13648
}

Semantic roles & 50–950 ramp

primary

#3663C3

secondary

#CCB789

accent

#AF48E0

background

#F8F8FD

surface

#F0F0FA

border

#CBCBD3

text

#0B0C14

muted

#7C7D83

Preview Lab

Preview with #3663C3

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

Preview Lab → · Contrast checker → · Palette generator →