#6366B2#6366B2

#6366B2 is a mid, moderate blue. Relative luminance 0.154; OKLCH L 54.3% C 0.117 H 280.0°. Best body text is #FFFFFF at 5.15:1 contrast (WCAG AA passes).

Color values

HEX	#6366B2
RGB	rgb(99, 102, 178)
HSL	hsl(238, 34%, 54%)
HSV	hsv(238, 44%, 70%)
CMYK	cmyk(44.4%, 42.7%, 0%, 30.2%)
CIE-LAB	lab(46.14, 18.94, -40.88)
CIE-LCH	lch(46.14, 45.05, 294.85°)
OKLab	oklab(54.29% 0.0204 -0.1155)
OKLCH	oklch(54.29% 0.117 280)
XYZ	xyz(17.9304, 15.3689, 44.1326)
Luminance	0.1537 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366B2 #B2AF63

analogous

#638EB2 #6366B2 #8863B2

triadic

#6366B2 #B26366 #66B263

tetradic

#6366B2 #B2638E #B2AF63 #63B288

square

#6366B2 #B2638E #B2AF63 #63B288

split-complementary

#6366B2 #B28863 #8EB263

monochromatic

#333568 #474A90 #6366B2 #8C8EC6 #B5B6DA

Accessibility & contrast

On white

5.15

#6366B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.07

#6366B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366B2

5.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366B2	#FFFFFF	#000000	##FFFFFF
##6366B2	1.00	5.15	4.07	5.15
#FFFFFF	5.15	1.00	21.00	1.00
#000000	4.07	21.00	1.00	21.00
##FFFFFF	5.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A70B5

Deuteranopia (green-blind)

#456AB0

Tritanopia (blue-blind)

#497683

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #6366b2;
/* rgb */ color: rgb(99, 102, 178);
/* oklch */ color: oklch(54.3% 0.117 280.0);

Tailwind

colors: {
  custom: {
    50: '#9391c9',
    500: '#6366b2',
    950: '#000000',
  },
}

SCSS

$custom: #6366b2;
$custom-light: #9391c9;
$custom-dark: #000000;

JSON

{
  "hex": "#6366b2",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 178
  },
  "hsl": {
    "h": 237.722,
    "s": 33.906,
    "l": 54.314
  },
  "oklch": {
    "l": 0.54292,
    "c": 0.11731,
    "h": 280
  },
  "luminance": 0.1537
}

Semantic roles & 50–950 ramp

primary

#6366B2

secondary

#C9C8A8

accent

#C65ECA

background

#F9F8FC

surface

#F2F0F8

border

#CCCBD1

text

#0D0C13

muted

#7E7D82

Preview Lab

Preview with #6366B2

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

Preview Lab → · Contrast checker → · Palette generator →