#6366C9#6366C9

#6366C9 is a mid, vivid blue. Relative luminance 0.164; OKLCH L 55.7% C 0.150 H 279.0°. Best body text is #FFFFFF at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#6366C9
RGB	rgb(99, 102, 201)
HSL	hsl(238, 49%, 59%)
HSV	hsv(238, 51%, 79%)
CMYK	cmyk(50.7%, 49.3%, 0%, 21.2%)
CIE-LAB	lab(47.46, 26.02, -52.09)
CIE-LCH	lch(47.46, 58.23, 296.54°)
OKLab	oklab(55.72% 0.0236 -0.1484)
OKLCH	oklch(55.72% 0.15 279)
XYZ	xyz(20.4363, 16.3713, 57.3301)
Luminance	0.1637 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366C9 #C9C663

analogous

#6399C9 #6366C9 #9363C9

triadic

#6366C9 #C96366 #66C963

tetradic

#6366C9 #C96399 #C9C663 #63C993

square

#6366C9 #C96399 #C9C663 #63C993

split-complementary

#6366C9 #C99363 #99C963

monochromatic

#2E3084 #3D41B1 #6366C9 #9093D9 #BEBFE8

Accessibility & contrast

On white

4.91

#6366C9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.27

#6366C9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366C9

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366C9	#FFFFFF	#000000	##FFFFFF
##6366C9	1.00	4.91	4.27	4.91
#FFFFFF	4.91	1.00	21.00	1.00
#000000	4.27	21.00	1.00	21.00
##FFFFFF	4.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3875CD

Deuteranopia (green-blind)

#2E6DC7

Tritanopia (blue-blind)

#3A7C8E

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #6366c9;
/* rgb */ color: rgb(99, 102, 201);
/* oklch */ color: oklch(55.7% 0.150 279.0);

Tailwind

colors: {
  custom: {
    50: '#9691da',
    500: '#6366c9',
    950: '#000000',
  },
}

SCSS

$custom: #6366c9;
$custom-light: #9691da;
$custom-dark: #000000;

JSON

{
  "hex": "#6366c9",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 201
  },
  "hsl": {
    "h": 238.235,
    "s": 48.571,
    "l": 58.824
  },
  "oklch": {
    "l": 0.55723,
    "c": 0.15024,
    "h": 279
  },
  "luminance": 0.16372
}

Semantic roles & 50–950 ramp

primary

#6366C9

secondary

#D8D7B0

accent

#D450D8

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #6366C9

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

Preview Lab → · Contrast checker → · Palette generator →