#3663AB#3663AB

#3663AB is a mid, vivid blue. Relative luminance 0.126; OKLCH L 50.5% C 0.125 H 259.4°. Best body text is #FFFFFF at 5.95:1 contrast (WCAG AA passes).

Color values

HEX	#3663AB
RGB	rgb(54, 99, 171)
HSL	hsl(217, 52%, 44%)
HSV	hsv(217, 68%, 67%)
CMYK	cmyk(68.4%, 42.1%, 0%, 32.9%)
CIE-LAB	lab(42.23, 8.81, -43.16)
CIE-LCH	lch(42.23, 44.05, 281.54°)
OKLab	oklab(50.46% -0.023 -0.1231)
OKLCH	oklch(50.46% 0.125 259.4)
XYZ	xyz(13.3312, 12.6469, 40.2587)
Luminance	0.1265 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663AB #AB7E36

analogous

#369EAB #3663AB #4436AB

triadic

#3663AB #AB3663 #63AB36

tetradic

#3663AB #AB369E #AB7E36 #36AB44

square

#3663AB #AB369E #AB7E36 #36AB44

split-complementary

#3663AB #AB4436 #9EAB36

monochromatic

#192D4E #27487C #3663AB #5582C9 #83A4D8

Accessibility & contrast

On white

5.95

#3663AB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.53

#3663AB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663AB

5.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663AB	#FFFFFF	#000000	##FFFFFF
##3663AB	1.00	5.95	3.53	5.95
#FFFFFF	5.95	1.00	21.00	1.00
#000000	3.53	21.00	1.00	21.00
##FFFFFF	5.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#416AAE

Deuteranopia (green-blind)

#2F5FAA

Tritanopia (blue-blind)

#00747E

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3663ab;
/* rgb */ color: rgb(54, 99, 171);
/* oklch */ color: oklch(50.5% 0.125 259.4);

Tailwind

colors: {
  custom: {
    50: '#7a8ec4',
    500: '#3663ab',
    950: '#000000',
  },
}

SCSS

$custom: #3663ab;
$custom-light: #7a8ec4;
$custom-dark: #000000;

JSON

{
  "hex": "#3663ab",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 171
  },
  "hsl": {
    "h": 216.923,
    "s": 52,
    "l": 44.118
  },
  "oklch": {
    "l": 0.50457,
    "c": 0.12528,
    "h": 259.4
  },
  "luminance": 0.12648
}

Semantic roles & 50–950 ramp

primary

#3663AB

secondary

#C2A77B

accent

#A44CDB

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #3663AB

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

Preview Lab → · Contrast checker → · Palette generator →