#6366E5#6366E5

#6366E5 is a mid, vivid blue. Relative luminance 0.178; OKLCH L 57.7% C 0.188 H 277.7°. Best body text is #FFFFFF at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#6366E5
RGB	rgb(99, 102, 229)
HSL	hsl(239, 71%, 64%)
HSV	hsv(239, 57%, 90%)
CMYK	cmyk(56.8%, 55.5%, 0%, 10.2%)
CIE-LAB	lab(49.27, 34.87, -65.11)
CIE-LCH	lch(49.27, 73.85, 298.17°)
OKLab	oklab(57.66% 0.0252 -0.1867)
OKLCH	oklch(57.66% 0.188 277.7)
XYZ	xyz(24.0353, 17.8108, 76.2848)
Luminance	0.1781 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366E5 #E5E263

analogous

#63A7E5 #6366E5 #A163E5

triadic

#6366E5 #E56366 #66E563

tetradic

#6366E5 #E563A7 #E5E263 #63E5A1

square

#6366E5 #E563A7 #E5E263 #63E5A1

split-complementary

#6366E5 #E5A163 #A7E563

monochromatic

#1D21B0 #2F33DC #6366E5 #9799EE #CCCDF6

Accessibility & contrast

On white

4.60

#6366E5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#6366E5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #6366E5

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366E5	#FFFFFF	#000000	##FFFFFF
##6366E5	1.00	4.60	4.56	4.60
#FFFFFF	4.60	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#007BE9

Deuteranopia (green-blind)

#0070E2

Tritanopia (blue-blind)

#13849C

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #6366e5;
/* rgb */ color: rgb(99, 102, 229);
/* oklch */ color: oklch(57.7% 0.188 277.7);

Tailwind

colors: {
  custom: {
    50: '#9a91ee',
    500: '#6366e5',
    950: '#000000',
  },
}

SCSS

$custom: #6366e5;
$custom-light: #9a91ee;
$custom-dark: #000000;

JSON

{
  "hex": "#6366e5",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 229
  },
  "hsl": {
    "h": 238.615,
    "s": 71.429,
    "l": 64.314
  },
  "oklch": {
    "l": 0.57655,
    "c": 0.18835,
    "h": 277.7
  },
  "luminance": 0.17813
}

Semantic roles & 50–950 ramp

primary

#6366E5

secondary

#E8E7BB

accent

#CF12D3

background

#FAF8FE

surface

#F3F0FD

border

#CDCBD5

text

#0F0D16

muted

#7F7D84

Preview Lab

Preview with #6366E5

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

Preview Lab → · Contrast checker → · Palette generator →