#3663BE#3663BE

#3663BE is a mid, vivid blue. Relative luminance 0.134; OKLCH L 51.7% C 0.152 H 262.6°. Best body text is #FFFFFF at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#3663BE
RGB	rgb(54, 99, 190)
HSL	hsl(220, 56%, 48%)
HSV	hsv(220, 72%, 75%)
CMYK	cmyk(71.6%, 47.9%, 0%, 25.5%)
CIE-LAB	lab(43.40, 15.82, -52.40)
CIE-LCH	lch(43.40, 54.74, 286.80°)
OKLab	oklab(51.74% -0.0196 -0.1503)
OKLCH	oklch(51.74% 0.152 262.6)
XYZ	xyz(15.2741, 13.4240, 50.4913)
Luminance	0.1343 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663BE #BE9136

analogous

#36A7BE #3663BE #4D36BE

triadic

#3663BE #BE3663 #63BE36

tetradic

#3663BE #BE36A7 #BE9136 #36BE4D

square

#3663BE #BE36A7 #BE9136 #36BE4D

split-complementary

#3663BE #BE4D36 #A7BE36

monochromatic

#1B315F #284A8E #3663BE #6085D2 #8FAADF

Accessibility & contrast

On white

5.70

#3663BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.69

#3663BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663BE

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663BE	#FFFFFF	#000000	##FFFFFF
##3663BE	1.00	5.70	3.69	5.70
#FFFFFF	5.70	1.00	21.00	1.00
#000000	3.69	21.00	1.00	21.00
##FFFFFF	5.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#326DC1

Deuteranopia (green-blind)

#0C61BC

Tritanopia (blue-blind)

#007887

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3663be;
/* rgb */ color: rgb(54, 99, 190);
/* oklch */ color: oklch(51.7% 0.152 262.6);

Tailwind

colors: {
  custom: {
    50: '#7e8ed2',
    500: '#3663be',
    950: '#000000',
  },
}

SCSS

$custom: #3663be;
$custom-light: #7e8ed2;
$custom-dark: #000000;

JSON

{
  "hex": "#3663be",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 190
  },
  "hsl": {
    "h": 220.147,
    "s": 55.738,
    "l": 47.843
  },
  "oklch": {
    "l": 0.51735,
    "c": 0.15158,
    "h": 262.6
  },
  "luminance": 0.13426
}

Semantic roles & 50–950 ramp

primary

#3663BE

secondary

#CAB386

accent

#AD49DF

background

#F8F8FD

surface

#EFF0FA

border

#CACBD3

text

#0B0C14

muted

#7C7D83

Preview Lab

Preview with #3663BE

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

Preview Lab → · Contrast checker → · Palette generator →