#3663B2#3663B2

#3663B2 is a mid, vivid blue. Relative luminance 0.129; OKLCH L 50.9% C 0.135 H 260.8°. Best body text is #FFFFFF at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#3663B2
RGB	rgb(54, 99, 178)
HSL	hsl(218, 53%, 45%)
HSV	hsv(218, 70%, 70%)
CMYK	cmyk(69.7%, 44.4%, 0%, 30.2%)
CIE-LAB	lab(42.64, 11.39, -46.60)
CIE-LCH	lch(42.64, 47.97, 283.73°)
OKLab	oklab(50.92% -0.0216 -0.1333)
OKLCH	oklch(50.92% 0.135 260.8)
XYZ	xyz(14.0162, 12.9209, 43.8662)
Luminance	0.1292 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663B2 #B28536

analogous

#36A1B2 #3663B2 #4736B2

triadic

#3663B2 #B23663 #63B236

tetradic

#3663B2 #B236A1 #B28536 #36B247

square

#3663B2 #B236A1 #B28536 #36B247

split-complementary

#3663B2 #B24736 #A1B236

monochromatic

#1A2F54 #284983 #3663B2 #5983CD #88A6DB

Accessibility & contrast

On white

5.86

#3663B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.58

#3663B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663B2

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663B2	#FFFFFF	#000000	##FFFFFF
##3663B2	1.00	5.86	3.58	5.86
#FFFFFF	5.86	1.00	21.00	1.00
#000000	3.58	21.00	1.00	21.00
##FFFFFF	5.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C6BB5

Deuteranopia (green-blind)

#265FB0

Tritanopia (blue-blind)

#007582

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3663b2;
/* rgb */ color: rgb(54, 99, 178);
/* oklch */ color: oklch(50.9% 0.135 260.8);

Tailwind

colors: {
  custom: {
    50: '#7c8ec9',
    500: '#3663b2',
    950: '#000000',
  },
}

SCSS

$custom: #3663b2;
$custom-light: #7c8ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#3663b2",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 178
  },
  "hsl": {
    "h": 218.226,
    "s": 53.448,
    "l": 45.49
  },
  "oklch": {
    "l": 0.50915,
    "c": 0.13501,
    "h": 260.8
  },
  "luminance": 0.12922
}

Semantic roles & 50–950 ramp

primary

#3663B2

secondary

#C5AB7F

accent

#A84BDD

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3663B2

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

Preview Lab → · Contrast checker → · Palette generator →