#6366C7#6366C7

#6366C7 is a mid, vivid blue. Relative luminance 0.163; OKLCH L 55.6% C 0.147 H 279.1°. Best body text is #FFFFFF at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#6366C7
RGB	rgb(99, 102, 199)
HSL	hsl(238, 47%, 58%)
HSV	hsv(238, 50%, 78%)
CMYK	cmyk(50.3%, 48.7%, 0%, 22%)
CIE-LAB	lab(47.34, 25.39, -51.13)
CIE-LCH	lch(47.34, 57.09, 296.41°)
OKLab	oklab(55.59% 0.0234 -0.1456)
OKLCH	oklch(55.59% 0.147 279.1)
XYZ	xyz(20.2026, 16.2778, 56.0991)
Luminance	0.1628 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366C7 #C7C463

analogous

#6398C7 #6366C7 #9263C7

triadic

#6366C7 #C76366 #66C763

tetradic

#6366C7 #C76398 #C7C463 #63C792

square

#6366C7 #C76398 #C7C463 #63C792

split-complementary

#6366C7 #C79263 #98C763

monochromatic

#2E3181 #3F42AE #6366C7 #9092D7 #BDBEE7

Accessibility & contrast

On white

4.93

#6366C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.26

#6366C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366C7

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366C7	#FFFFFF	#000000	##FFFFFF
##6366C7	1.00	4.93	4.26	4.93
#FFFFFF	4.93	1.00	21.00	1.00
#000000	4.26	21.00	1.00	21.00
##FFFFFF	4.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A74CB

Deuteranopia (green-blind)

#306CC5

Tritanopia (blue-blind)

#3B7B8D

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #6366c7;
/* rgb */ color: rgb(99, 102, 199);
/* oklch */ color: oklch(55.6% 0.147 279.1);

Tailwind

colors: {
  custom: {
    50: '#9691d8',
    500: '#6366c7',
    950: '#000000',
  },
}

SCSS

$custom: #6366c7;
$custom-light: #9691d8;
$custom-dark: #000000;

JSON

{
  "hex": "#6366c7",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 199
  },
  "hsl": {
    "h": 238.2,
    "s": 47.17,
    "l": 58.431
  },
  "oklch": {
    "l": 0.55593,
    "c": 0.14743,
    "h": 279.1
  },
  "luminance": 0.16279
}

Semantic roles & 50–950 ramp

primary

#6366C7

secondary

#D7D6AF

accent

#D351D7

background

#F9F8FD

surface

#F2F0FA

border

#CCCBD3

text

#0E0C14

muted

#7E7D83

Preview Lab

Preview with #6366C7

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

Preview Lab → · Contrast checker → · Palette generator →