#3663BC#3663BC

#3663BC is a mid, vivid blue. Relative luminance 0.133; OKLCH L 51.6% C 0.149 H 262.3°. Best body text is #FFFFFF at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#3663BC
RGB	rgb(54, 99, 188)
HSL	hsl(220, 55%, 47%)
HSV	hsv(220, 71%, 74%)
CMYK	cmyk(71.3%, 47.3%, 0%, 26.3%)
CIE-LAB	lab(43.27, 15.08, -51.44)
CIE-LCH	lch(43.27, 53.61, 286.34°)
OKLab	oklab(51.6% -0.0199 -0.1475)
OKLCH	oklch(51.6% 0.149 262.3)
XYZ	xyz(15.0570, 13.3372, 49.3480)
Luminance	0.1334 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663BC #BC8F36

analogous

#36A6BC #3663BC #4C36BC

triadic

#3663BC #BC3663 #63BC36

tetradic

#3663BC #BC36A6 #BC8F36 #36BC4C

square

#3663BC #BC36A6 #BC8F36 #36BC4C

split-complementary

#3663BC #BC4C36 #A6BC36

monochromatic

#1B315D #284A8C #3663BC #5E85D1 #8EA9DF

Accessibility & contrast

On white

5.73

#3663BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.67

#3663BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663BC

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663BC	#FFFFFF	#000000	##FFFFFF
##3663BC	1.00	5.73	3.67	5.73
#FFFFFF	5.73	1.00	21.00	1.00
#000000	3.67	21.00	1.00	21.00
##FFFFFF	5.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#346DBF

Deuteranopia (green-blind)

#1360BA

Tritanopia (blue-blind)

#007886

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3663bc;
/* rgb */ color: rgb(54, 99, 188);
/* oklch */ color: oklch(51.6% 0.149 262.3);

Tailwind

colors: {
  custom: {
    50: '#7e8ed1',
    500: '#3663bc',
    950: '#000000',
  },
}

SCSS

$custom: #3663bc;
$custom-light: #7e8ed1;
$custom-dark: #000000;

JSON

{
  "hex": "#3663bc",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 188
  },
  "hsl": {
    "h": 219.851,
    "s": 55.372,
    "l": 47.451
  },
  "oklch": {
    "l": 0.51595,
    "c": 0.14883,
    "h": 262.3
  },
  "luminance": 0.13339
}

Semantic roles & 50–950 ramp

primary

#3663BC

secondary

#C9B285

accent

#AC49DF

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3663BC

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

Preview Lab → · Contrast checker → · Palette generator →