#6366CF#6366CF

#6366CF is a mid, vivid blue. Relative luminance 0.167; OKLCH L 56.1% C 0.159 H 278.7°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#6366CF
RGB	rgb(99, 102, 207)
HSL	hsl(238, 53%, 60%)
HSV	hsv(238, 52%, 81%)
CMYK	cmyk(52.2%, 50.7%, 0%, 18.8%)
CIE-LAB	lab(47.83, 27.90, -54.94)
CIE-LCH	lch(47.83, 61.61, 296.92°)
OKLab	oklab(56.12% 0.0241 -0.1567)
OKLCH	oklch(56.12% 0.159 278.7)
XYZ	xyz(21.1559, 16.6591, 61.1201)
Luminance	0.1666 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366CF #CFCC63

analogous

#639CCF #6366CF #9663CF

triadic

#6366CF #CF6366 #66CF63

tetradic

#6366CF #CF639C #CFCC63 #63CF96

square

#6366CF #CF639C #CFCC63 #63CF96

split-complementary

#6366CF #CF9663 #9CCF63

monochromatic

#2B2E8C #3A3DBB #6366CF #9294DD #C1C2EC

Accessibility & contrast

On white

4.85

#6366CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#6366CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366CF

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366CF	#FFFFFF	#000000	##FFFFFF
##6366CF	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3176D3

Deuteranopia (green-blind)

#246DCD

Tritanopia (blue-blind)

#347D91

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #6366cf;
/* rgb */ color: rgb(99, 102, 207);
/* oklch */ color: oklch(56.1% 0.159 278.7);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#6366cf",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 207
  },
  "hsl": {
    "h": 238.333,
    "s": 52.941,
    "l": 60
  },
  "oklch": {
    "l": 0.5612,
    "c": 0.15858,
    "h": 278.7
  },
  "luminance": 0.1666
}

Semantic roles & 50–950 ramp

primary

#6366CF

secondary

#DCDBB2

accent

#D84BDC

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #6366CF

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

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