#6366D7#6366D7

#6366D7 is a mid, vivid blue. Relative luminance 0.171; OKLCH L 56.7% C 0.170 H 278.4°. Best body text is #FFFFFF at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#6366D7
RGB	rgb(99, 102, 215)
HSL	hsl(238, 59%, 62%)
HSV	hsv(238, 54%, 84%)
CMYK	cmyk(54%, 52.6%, 0%, 15.7%)
CIE-LAB	lab(48.34, 30.42, -58.68)
CIE-LCH	lch(48.34, 66.10, 297.40°)
OKLab	oklab(56.66% 0.0247 -0.1678)
OKLCH	oklch(56.66% 0.17 278.4)
XYZ	xyz(22.1588, 17.0603, 66.4021)
Luminance	0.1706 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366D7 #D7D463

analogous

#63A0D7 #6366D7 #9A63D7

triadic

#6366D7 #D76366 #66D763

tetradic

#6366D7 #D763A0 #D7D463 #63D79A

square

#6366D7 #D763A0 #D7D463 #63D79A

split-complementary

#6366D7 #D79A63 #A0D763

monochromatic

#272A98 #3437C9 #6366D7 #9496E3 #C4C6F0

Accessibility & contrast

On white

4.76

#6366D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.41

#6366D7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366D7

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366D7	#FFFFFF	#000000	##FFFFFF
##6366D7	1.00	4.76	4.41	4.76
#FFFFFF	4.76	1.00	21.00	1.00
#000000	4.41	21.00	1.00	21.00
##FFFFFF	4.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2678DB

Deuteranopia (green-blind)

#106ED5

Tritanopia (blue-blind)

#2C8095

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #6366d7;
/* rgb */ color: rgb(99, 102, 215);
/* oklch */ color: oklch(56.7% 0.170 278.4);

Tailwind

colors: {
  custom: {
    50: '#9891e4',
    500: '#6366d7',
    950: '#000000',
  },
}

SCSS

$custom: #6366d7;
$custom-light: #9891e4;
$custom-dark: #000000;

JSON

{
  "hex": "#6366d7",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 215
  },
  "hsl": {
    "h": 238.448,
    "s": 59.184,
    "l": 61.569
  },
  "oklch": {
    "l": 0.56664,
    "c": 0.16956,
    "h": 278.4
  },
  "luminance": 0.17062
}

Semantic roles & 50–950 ramp

primary

#6366D7

secondary

#E0DFB5

accent

#C21FC7

background

#F9F8FE

surface

#F2F0FC

border

#CCCBD5

text

#0E0C16

muted

#7E7D84

Preview Lab

Preview with #6366D7

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

Preview Lab → · Contrast checker → · Palette generator →