#6366DC#6366DC

#6366DC is a mid, vivid blue. Relative luminance 0.173; OKLCH L 57.0% C 0.176 H 278.1°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#6366DC
RGB	rgb(99, 102, 220)
HSL	hsl(239, 63%, 63%)
HSV	hsv(239, 55%, 86%)
CMYK	cmyk(55%, 53.6%, 0%, 13.7%)
CIE-LAB	lab(48.66, 32.01, -60.99)
CIE-LCH	lch(48.66, 68.88, 297.69°)
OKLab	oklab(57.01% 0.0249 -0.1746)
OKLCH	oklch(57.01% 0.176 278.1)
XYZ	xyz(22.8111, 17.3212, 69.8376)
Luminance	0.1732 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366DC #DCD963

analogous

#63A3DC #6366DC #9C63DC

triadic

#6366DC #DC6366 #66DC63

tetradic

#6366DC #DC63A3 #DCD963 #63DC9C

square

#6366DC #DC63A3 #DCD963 #63DC9C

split-complementary

#6366DC #DC9C63 #A3DC63

monochromatic

#2427A1 #3135D1 #6366DC #9597E7 #C7C8F2

Accessibility & contrast

On white

4.70

#6366DC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#6366DC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366DC

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366DC	#FFFFFF	#000000	##FFFFFF
##6366DC	1.00	4.70	4.46	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D79E0

Deuteranopia (green-blind)

#006FDA

Tritanopia (blue-blind)

#258197

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #6366dc;
/* rgb */ color: rgb(99, 102, 220);
/* oklch */ color: oklch(57.0% 0.176 278.1);

Tailwind

colors: {
  custom: {
    50: '#9991e8',
    500: '#6366dc',
    950: '#000000',
  },
}

SCSS

$custom: #6366dc;
$custom-light: #9991e8;
$custom-dark: #000000;

JSON

{
  "hex": "#6366dc",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 220
  },
  "hsl": {
    "h": 238.512,
    "s": 63.351,
    "l": 62.549
  },
  "oklch": {
    "l": 0.57013,
    "c": 0.17633,
    "h": 278.1
  },
  "luminance": 0.17323
}

Semantic roles & 50–950 ramp

primary

#6366DC

secondary

#E3E2B7

accent

#C71ACB

background

#F9F8FE

surface

#F2F0FD

border

#CCCBD5

text

#0F0C16

muted

#7E7D84

Preview Lab

Preview with #6366DC

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

Preview Lab → · Contrast checker → · Palette generator →