#6366B9#6366B9

#6366B9 is a mid, vivid blue. Relative luminance 0.157; OKLCH L 54.7% C 0.127 H 279.7°. Best body text is #FFFFFF at 5.08:1 contrast (WCAG AA passes).

Color values

HEX	#6366B9
RGB	rgb(99, 102, 185)
HSL	hsl(238, 38%, 56%)
HSV	hsv(238, 46%, 73%)
CMYK	cmyk(46.5%, 44.9%, 0%, 27.5%)
CIE-LAB	lab(46.52, 21.06, -44.34)
CIE-LCH	lch(46.52, 49.09, 295.41°)
OKLab	oklab(54.71% 0.0216 -0.1257)
OKLCH	oklch(54.71% 0.127 279.7)
XYZ	xyz(18.6513, 15.6572, 47.9289)
Luminance	0.1566 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366B9 #B9B663

analogous

#6391B9 #6366B9 #8B63B9

triadic

#6366B9 #B96366 #66B963

tetradic

#6366B9 #B96391 #B9B663 #63B98B

square

#6366B9 #B96391 #B9B663 #63B98B

split-complementary

#6366B9 #B98B63 #91B963

monochromatic

#323470 #45489A #6366B9 #8D8FCC #B7B9DF

Accessibility & contrast

On white

5.08

#6366B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.13

#6366B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366B9

5.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366B9	#FFFFFF	#000000	##FFFFFF
##6366B9	1.00	5.08	4.13	5.08
#FFFFFF	5.08	1.00	21.00	1.00
#000000	4.13	21.00	1.00	21.00
##FFFFFF	5.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4572BC

Deuteranopia (green-blind)

#3F6BB7

Tritanopia (blue-blind)

#457786

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #6366b9;
/* rgb */ color: rgb(99, 102, 185);
/* oklch */ color: oklch(54.7% 0.127 279.7);

Tailwind

colors: {
  custom: {
    50: '#9491ce',
    500: '#6366b9',
    950: '#000000',
  },
}

SCSS

$custom: #6366b9;
$custom-light: #9491ce;
$custom-dark: #000000;

JSON

{
  "hex": "#6366b9",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 185
  },
  "hsl": {
    "h": 237.907,
    "s": 38.053,
    "l": 55.686
  },
  "oklch": {
    "l": 0.54712,
    "c": 0.12749,
    "h": 279.7
  },
  "luminance": 0.15658
}

Semantic roles & 50–950 ramp

primary

#6366B9

secondary

#CECDAA

accent

#CA5ACE

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0C14

muted

#7E7D82

Preview Lab

Preview with #6366B9

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

Preview Lab → · Contrast checker → · Palette generator →