#6366CE#6366CE

#6366CE is a mid, vivid blue. Relative luminance 0.166; OKLCH L 56.1% C 0.157 H 278.8°. Best body text is #FFFFFF at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#6366CE
RGB	rgb(99, 102, 206)
HSL	hsl(238, 52%, 60%)
HSV	hsv(238, 52%, 81%)
CMYK	cmyk(51.9%, 50.5%, 0%, 19.2%)
CIE-LAB	lab(47.77, 27.58, -54.46)
CIE-LCH	lch(47.77, 61.05, 296.86°)
OKLab	oklab(56.05% 0.024 -0.1553)
OKLCH	oklch(56.05% 0.157 278.8)
XYZ	xyz(21.0341, 16.6104, 60.4783)
Luminance	0.1661 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366CE #CECB63

analogous

#639BCE #6366CE #9663CE

triadic

#6366CE #CE6366 #66CE63

tetradic

#6366CE #CE639B #CECB63 #63CE96

square

#6366CE #CE639B #CECB63 #63CE96

split-complementary

#6366CE #CE9663 #9BCE63

monochromatic

#2C2E8B #3A3EBA #6366CE #9294DD #C0C1EB

Accessibility & contrast

On white

4.86

#6366CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.32

#6366CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366CE

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366CE	#FFFFFF	#000000	##FFFFFF
##6366CE	1.00	4.86	4.32	4.86
#FFFFFF	4.86	1.00	21.00	1.00
#000000	4.32	21.00	1.00	21.00
##FFFFFF	4.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3276D2

Deuteranopia (green-blind)

#266DCC

Tritanopia (blue-blind)

#357D90

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #6366ce;
/* rgb */ color: rgb(99, 102, 206);
/* oklch */ color: oklch(56.1% 0.157 278.8);

Tailwind

colors: {
  custom: {
    50: '#9791de',
    500: '#6366ce',
    950: '#000000',
  },
}

SCSS

$custom: #6366ce;
$custom-light: #9791de;
$custom-dark: #000000;

JSON

{
  "hex": "#6366ce",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 206
  },
  "hsl": {
    "h": 238.318,
    "s": 52.195,
    "l": 59.804
  },
  "oklch": {
    "l": 0.56053,
    "c": 0.1572,
    "h": 278.8
  },
  "luminance": 0.16612
}

Semantic roles & 50–950 ramp

primary

#6366CE

secondary

#DBDAB2

accent

#D84CDC

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #6366CE

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

Preview Lab → · Contrast checker → · Palette generator →