#6366D5#6366D5

#6366D5 is a mid, vivid blue. Relative luminance 0.170; OKLCH L 56.5% C 0.167 H 278.5°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#6366D5
RGB	rgb(99, 102, 213)
HSL	hsl(238, 58%, 61%)
HSV	hsv(238, 54%, 84%)
CMYK	cmyk(53.5%, 52.1%, 0%, 16.5%)
CIE-LAB	lab(48.21, 29.79, -57.75)
CIE-LCH	lch(48.21, 64.98, 297.29°)
OKLab	oklab(56.53% 0.0246 -0.165)
OKLCH	oklch(56.53% 0.167 278.5)
XYZ	xyz(21.9034, 16.9581, 65.0569)
Luminance	0.1696 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366D5 #D5D263

analogous

#639FD5 #6366D5 #9963D5

triadic

#6366D5 #D56366 #66D563

tetradic

#6366D5 #D5639F #D5D263 #63D599

square

#6366D5 #D5639F #D5D263 #63D599

split-complementary

#6366D5 #D59963 #9FD563

monochromatic

#282B95 #3539C6 #6366D5 #9395E2 #C3C5EF

Accessibility & contrast

On white

4.78

#6366D5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#6366D5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366D5

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366D5	#FFFFFF	#000000	##FFFFFF
##6366D5	1.00	4.78	4.39	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2977D9

Deuteranopia (green-blind)

#176ED3

Tritanopia (blue-blind)

#2E7F94

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #6366d5;
/* rgb */ color: rgb(99, 102, 213);
/* oklch */ color: oklch(56.5% 0.167 278.5);

Tailwind

colors: {
  custom: {
    50: '#9891e3',
    500: '#6366d5',
    950: '#000000',
  },
}

SCSS

$custom: #6366d5;
$custom-light: #9891e3;
$custom-dark: #000000;

JSON

{
  "hex": "#6366d5",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 213
  },
  "hsl": {
    "h": 238.421,
    "s": 57.576,
    "l": 61.176
  },
  "oklch": {
    "l": 0.56527,
    "c": 0.16684,
    "h": 278.5
  },
  "luminance": 0.16959
}

Semantic roles & 50–950 ramp

primary

#6366D5

secondary

#DFDEB4

accent

#C120C5

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #6366D5

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

Preview Lab → · Contrast checker → · Palette generator →