#6366D8#6366D8

#6366D8 is a mid, vivid blue. Relative luminance 0.171; OKLCH L 56.7% C 0.171 H 278.3°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#6366D8
RGB	rgb(99, 102, 216)
HSL	hsl(238, 60%, 62%)
HSV	hsv(238, 54%, 85%)
CMYK	cmyk(54.2%, 52.8%, 0%, 15.3%)
CIE-LAB	lab(48.40, 30.74, -59.14)
CIE-LCH	lch(48.40, 66.66, 297.46°)
OKLab	oklab(56.73% 0.0247 -0.1691)
OKLCH	oklch(56.73% 0.171 278.3)
XYZ	xyz(22.2877, 17.1118, 67.0809)
Luminance	0.1711 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366D8 #D8D563

analogous

#63A0D8 #6366D8 #9B63D8

triadic

#6366D8 #D86366 #66D863

tetradic

#6366D8 #D863A0 #D8D563 #63D89B

square

#6366D8 #D863A0 #D8D563 #63D89B

split-complementary

#6366D8 #D89B63 #A0D863

monochromatic

#27299A #3337CB #6366D8 #9496E4 #C5C6F0

Accessibility & contrast

On white

4.75

#6366D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.42

#6366D8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366D8

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366D8	#FFFFFF	#000000	##FFFFFF
##6366D8	1.00	4.75	4.42	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.42	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2578DC

Deuteranopia (green-blind)

#0C6ED6

Tritanopia (blue-blind)

#2B8095

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #6366d8;
/* rgb */ color: rgb(99, 102, 216);
/* oklch */ color: oklch(56.7% 0.171 278.3);

Tailwind

colors: {
  custom: {
    50: '#9891e5',
    500: '#6366d8',
    950: '#000000',
  },
}

SCSS

$custom: #6366d8;
$custom-light: #9891e5;
$custom-dark: #000000;

JSON

{
  "hex": "#6366d8",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 216
  },
  "hsl": {
    "h": 238.462,
    "s": 60,
    "l": 61.765
  },
  "oklch": {
    "l": 0.56734,
    "c": 0.17092,
    "h": 278.3
  },
  "luminance": 0.17113
}

Semantic roles & 50–950 ramp

primary

#6366D8

secondary

#E1E0B6

accent

#C31EC8

background

#F9F8FE

surface

#F2F0FC

border

#CCCBD5

text

#0F0C16

muted

#7E7D84

Preview Lab

Preview with #6366D8

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

Preview Lab → · Contrast checker → · Palette generator →