#3663AC#3663AC

#3663AC is a mid, vivid blue. Relative luminance 0.127; OKLCH L 50.5% C 0.127 H 259.6°. Best body text is #FFFFFF at 5.94:1 contrast (WCAG AA passes).

Color values

HEX	#3663AC
RGB	rgb(54, 99, 172)
HSL	hsl(217, 52%, 44%)
HSV	hsv(217, 69%, 67%)
CMYK	cmyk(68.6%, 42.4%, 0%, 32.5%)
CIE-LAB	lab(42.28, 9.18, -43.65)
CIE-LCH	lch(42.28, 44.61, 281.87°)
OKLab	oklab(50.52% -0.0228 -0.1246)
OKLCH	oklch(50.52% 0.127 259.6)
XYZ	xyz(13.4269, 12.6851, 40.7626)
Luminance	0.1269 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663AC #AC7F36

analogous

#369EAC #3663AC #4436AC

triadic

#3663AC #AC3663 #63AC36

tetradic

#3663AC #AC369E #AC7F36 #36AC44

square

#3663AC #AC369E #AC7F36 #36AC44

split-complementary

#3663AC #AC4436 #9EAC36

monochromatic

#192D4F #27487D #3663AC #5582CA #84A4D8

Accessibility & contrast

On white

5.94

#3663AC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#3663AC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663AC

5.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663AC	#FFFFFF	#000000	##FFFFFF
##3663AC	1.00	5.94	3.54	5.94
#FFFFFF	5.94	1.00	21.00	1.00
#000000	3.54	21.00	1.00	21.00
##FFFFFF	5.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#416AAF

Deuteranopia (green-blind)

#2E5FAB

Tritanopia (blue-blind)

#00747F

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3663ac;
/* rgb */ color: rgb(54, 99, 172);
/* oklch */ color: oklch(50.5% 0.127 259.6);

Tailwind

colors: {
  custom: {
    50: '#7a8ec5',
    500: '#3663ac',
    950: '#000000',
  },
}

SCSS

$custom: #3663ac;
$custom-light: #7a8ec5;
$custom-dark: #000000;

JSON

{
  "hex": "#3663ac",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 172
  },
  "hsl": {
    "h": 217.119,
    "s": 52.212,
    "l": 44.314
  },
  "oklch": {
    "l": 0.50522,
    "c": 0.12666,
    "h": 259.6
  },
  "luminance": 0.12687
}

Semantic roles & 50–950 ramp

primary

#3663AC

secondary

#C2A77C

accent

#A54CDC

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #3663AC

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

Preview Lab → · Contrast checker → · Palette generator →