#6566CC#6566CC

#6566CC is a mid, vivid blue. Relative luminance 0.166; OKLCH L 56.1% C 0.154 H 279.8°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#6566CC
RGB	rgb(101, 102, 204)
HSL	hsl(239, 50%, 60%)
HSV	hsv(239, 50%, 80%)
CMYK	cmyk(50.5%, 50%, 0%, 20%)
CIE-LAB	lab(47.79, 27.39, -53.27)
CIE-LCH	lch(47.79, 59.90, 297.21°)
OKLab	oklab(56.07% 0.0262 -0.1518)
OKLCH	oklch(56.07% 0.154 279.8)
XYZ	xyz(21.0139, 16.6279, 59.2172)
Luminance	0.1663 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6566CC #CCCB65

analogous

#659ACC #6566CC #9765CC

triadic

#6566CC #CC6566 #66CC65

tetradic

#6566CC #CC659A #CCCB65 #65CC97

square

#6566CC #CC659A #CCCB65 #65CC97

split-complementary

#6566CC #CC9765 #9ACC65

monochromatic

#2D2E89 #3D3EB7 #6566CC #9394DB #C1C1EA

Accessibility & contrast

On white

4.85

#6566CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#6566CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6566CC

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6566CC	#FFFFFF	#000000	##FFFFFF
##6566CC	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)

#3575D0

Deuteranopia (green-blind)

#2B6ECA

Tritanopia (blue-blind)

#3C7C8F

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #6566cc;
/* rgb */ color: rgb(101, 102, 204);
/* oklch */ color: oklch(56.1% 0.154 279.8);

Tailwind

colors: {
  custom: {
    50: '#9891dc',
    500: '#6566cc',
    950: '#000000',
  },
}

SCSS

$custom: #6566cc;
$custom-light: #9891dc;
$custom-dark: #000000;

JSON

{
  "hex": "#6566cc",
  "rgb": {
    "r": 101,
    "g": 102,
    "b": 204
  },
  "hsl": {
    "h": 239.417,
    "s": 50.244,
    "l": 59.804
  },
  "oklch": {
    "l": 0.56068,
    "c": 0.15404,
    "h": 279.8
  },
  "luminance": 0.16629
}

Semantic roles & 50–950 ramp

primary

#6566CC

secondary

#DADAB2

accent

#D84EDA

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #6566CC

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

Preview Lab → · Contrast checker → · Palette generator →