#3663B6#3663B6

#3663B6 is a mid, vivid blue. Relative luminance 0.131; OKLCH L 51.2% C 0.141 H 261.4°. Best body text is #FFFFFF at 5.81:1 contrast (WCAG AA passes).

Color values

HEX	#3663B6
RGB	rgb(54, 99, 182)
HSL	hsl(219, 54%, 46%)
HSV	hsv(219, 70%, 71%)
CMYK	cmyk(70.3%, 45.6%, 0%, 28.6%)
CIE-LAB	lab(42.89, 12.86, -48.55)
CIE-LCH	lch(42.89, 50.23, 284.84°)
OKLab	oklab(51.18% -0.0209 -0.139)
OKLCH	oklch(51.18% 0.141 261.4)
XYZ	xyz(14.4236, 13.0839, 46.0122)
Luminance	0.1308 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663B6 #B68936

analogous

#36A3B6 #3663B6 #4936B6

triadic

#3663B6 #B63663 #63B636

tetradic

#3663B6 #B636A3 #B68936 #36B649

square

#3663B6 #B636A3 #B68936 #36B649

split-complementary

#3663B6 #B64936 #A3B636

monochromatic

#1A3058 #284987 #3663B6 #5B83CE #8AA7DC

Accessibility & contrast

On white

5.81

#3663B6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.62

#3663B6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663B6

5.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663B6	#FFFFFF	#000000	##FFFFFF
##3663B6	1.00	5.81	3.62	5.81
#FFFFFF	5.81	1.00	21.00	1.00
#000000	3.62	21.00	1.00	21.00
##FFFFFF	5.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#396CB9

Deuteranopia (green-blind)

#2060B4

Tritanopia (blue-blind)

#007683

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3663b6;
/* rgb */ color: rgb(54, 99, 182);
/* oklch */ color: oklch(51.2% 0.141 261.4);

Tailwind

colors: {
  custom: {
    50: '#7c8ecc',
    500: '#3663b6',
    950: '#000000',
  },
}

SCSS

$custom: #3663b6;
$custom-light: #7c8ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#3663b6",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 182
  },
  "hsl": {
    "h": 218.906,
    "s": 54.237,
    "l": 46.275
  },
  "oklch": {
    "l": 0.51183,
    "c": 0.14055,
    "h": 261.4
  },
  "luminance": 0.13085
}

Semantic roles & 50–950 ramp

primary

#3663B6

secondary

#C6AE81

accent

#AA4ADE

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3663B6

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

Preview Lab → · Contrast checker → · Palette generator →