#6366D1#6366D1

#6366D1 is a mid, vivid blue. Relative luminance 0.168; OKLCH L 56.3% C 0.161 H 278.7°. Best body text is #FFFFFF at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#6366D1
RGB	rgb(99, 102, 209)
HSL	hsl(238, 54%, 60%)
HSV	hsv(238, 53%, 82%)
CMYK	cmyk(52.6%, 51.2%, 0%, 18%)
CIE-LAB	lab(47.95, 28.53, -55.88)
CIE-LCH	lch(47.95, 62.74, 297.05°)
OKLab	oklab(56.26% 0.0243 -0.1595)
OKLCH	oklch(56.26% 0.161 278.7)
XYZ	xyz(21.4020, 16.7575, 62.4160)
Luminance	0.1676 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366D1 #D1CE63

analogous

#639DD1 #6366D1 #9763D1

triadic

#6366D1 #D16366 #66D163

tetradic

#6366D1 #D1639D #D1CE63 #63D197

square

#6366D1 #D1639D #D1CE63 #63D197

split-complementary

#6366D1 #D19763 #9DD163

monochromatic

#2A2D8F #383CBF #6366D1 #9294DF #C2C3ED

Accessibility & contrast

On white

4.83

#6366D1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.35

#6366D1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366D1

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366D1	#FFFFFF	#000000	##FFFFFF
##6366D1	1.00	4.83	4.35	4.83
#FFFFFF	4.83	1.00	21.00	1.00
#000000	4.35	21.00	1.00	21.00
##FFFFFF	4.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F76D5

Deuteranopia (green-blind)

#216ECF

Tritanopia (blue-blind)

#327E92

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #6366d1;
/* rgb */ color: rgb(99, 102, 209);
/* oklch */ color: oklch(56.3% 0.161 278.7);

Tailwind

colors: {
  custom: {
    50: '#9791e0',
    500: '#6366d1',
    950: '#000000',
  },
}

SCSS

$custom: #6366d1;
$custom-light: #9791e0;
$custom-dark: #000000;

JSON

{
  "hex": "#6366d1",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 209
  },
  "hsl": {
    "h": 238.364,
    "s": 54.455,
    "l": 60.392
  },
  "oklch": {
    "l": 0.56255,
    "c": 0.16135,
    "h": 278.7
  },
  "luminance": 0.16759
}

Semantic roles & 50–950 ramp

primary

#6366D1

secondary

#DDDCB3

accent

#BE24C2

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #6366D1

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

Preview Lab → · Contrast checker → · Palette generator →