#6366D6#6366D6

#6366D6 is a mid, vivid blue. Relative luminance 0.170; OKLCH L 56.6% C 0.168 H 278.4°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#6366D6
RGB	rgb(99, 102, 214)
HSL	hsl(238, 58%, 61%)
HSV	hsv(238, 54%, 84%)
CMYK	cmyk(53.7%, 52.3%, 0%, 16.1%)
CIE-LAB	lab(48.27, 30.11, -58.22)
CIE-LCH	lch(48.27, 65.54, 297.35°)
OKLab	oklab(56.6% 0.0246 -0.1664)
OKLCH	oklch(56.6% 0.168 278.4)
XYZ	xyz(22.0307, 17.0090, 65.7275)
Luminance	0.1701 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366D6 #D6D363

analogous

#63A0D6 #6366D6 #9A63D6

triadic

#6366D6 #D66366 #66D663

tetradic

#6366D6 #D663A0 #D6D363 #63D69A

square

#6366D6 #D663A0 #D6D363 #63D69A

split-complementary

#6366D6 #D69A63 #A0D663

monochromatic

#282B97 #3438C7 #6366D6 #9396E3 #C4C5EF

Accessibility & contrast

On white

4.77

#6366D6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#6366D6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366D6

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366D6	#FFFFFF	#000000	##FFFFFF
##6366D6	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2877DA

Deuteranopia (green-blind)

#146ED4

Tritanopia (blue-blind)

#2D7F94

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #6366d6;
/* rgb */ color: rgb(99, 102, 214);
/* oklch */ color: oklch(56.6% 0.168 278.4);

Tailwind

colors: {
  custom: {
    50: '#9891e3',
    500: '#6366d6',
    950: '#000000',
  },
}

SCSS

$custom: #6366d6;
$custom-light: #9891e3;
$custom-dark: #000000;

JSON

{
  "hex": "#6366d6",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 214
  },
  "hsl": {
    "h": 238.435,
    "s": 58.376,
    "l": 61.373
  },
  "oklch": {
    "l": 0.56595,
    "c": 0.1682,
    "h": 278.4
  },
  "luminance": 0.1701
}

Semantic roles & 50–950 ramp

primary

#6366D6

secondary

#E0DFB5

accent

#C220C6

background

#F9F8FE

surface

#F2F0FC

border

#CCCBD5

text

#0E0C15

muted

#7E7D84

Preview Lab

Preview with #6366D6

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

Preview Lab → · Contrast checker → · Palette generator →