#6366D4#6366D4

#6366D4 is a mid, vivid blue. Relative luminance 0.169; OKLCH L 56.5% C 0.165 H 278.5°. Best body text is #FFFFFF at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#6366D4
RGB	rgb(99, 102, 212)
HSL	hsl(238, 57%, 61%)
HSV	hsv(238, 53%, 83%)
CMYK	cmyk(53.3%, 51.9%, 0%, 16.9%)
CIE-LAB	lab(48.14, 29.47, -57.28)
CIE-LCH	lch(48.14, 64.42, 297.23°)
OKLab	oklab(56.46% 0.0245 -0.1636)
OKLCH	oklch(56.46% 0.165 278.5)
XYZ	xyz(21.7769, 16.9075, 64.3905)
Luminance	0.1691 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366D4 #D4D163

analogous

#639ED4 #6366D4 #9863D4

triadic

#6366D4 #D46366 #66D463

tetradic

#6366D4 #D4639E #D4D163 #63D498

square

#6366D4 #D4639E #D4D163 #63D498

split-complementary

#6366D4 #D49863 #9ED463

monochromatic

#292C94 #363AC4 #6366D4 #9395E1 #C3C4EE

Accessibility & contrast

On white

4.79

#6366D4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.38

#6366D4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366D4

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366D4	#FFFFFF	#000000	##FFFFFF
##6366D4	1.00	4.79	4.38	4.79
#FFFFFF	4.79	1.00	21.00	1.00
#000000	4.38	21.00	1.00	21.00
##FFFFFF	4.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B77D8

Deuteranopia (green-blind)

#1A6ED2

Tritanopia (blue-blind)

#2F7F93

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #6366d4;
/* rgb */ color: rgb(99, 102, 212);
/* oklch */ color: oklch(56.5% 0.165 278.5);

Tailwind

colors: {
  custom: {
    50: '#9891e2',
    500: '#6366d4',
    950: '#000000',
  },
}

SCSS

$custom: #6366d4;
$custom-light: #9891e2;
$custom-dark: #000000;

JSON

{
  "hex": "#6366d4",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 212
  },
  "hsl": {
    "h": 238.407,
    "s": 56.784,
    "l": 60.98
  },
  "oklch": {
    "l": 0.56458,
    "c": 0.16546,
    "h": 278.5
  },
  "luminance": 0.16909
}

Semantic roles & 50–950 ramp

primary

#6366D4

secondary

#DFDEB4

accent

#C021C4

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #6366D4

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

Preview Lab → · Contrast checker → · Palette generator →