#6566EB#6566EB

#6566EB is a mid, vivid blue. Relative luminance 0.183; OKLCH L 58.2% C 0.196 H 278.1°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#6566EB
RGB	rgb(101, 102, 235)
HSL	hsl(240, 77%, 66%)
HSV	hsv(240, 57%, 92%)
CMYK	cmyk(57%, 56.6%, 0%, 7.8%)
CIE-LAB	lab(49.82, 37.13, -67.58)
CIE-LCH	lch(49.82, 77.11, 298.78°)
OKLab	oklab(58.23% 0.0276 -0.1939)
OKLCH	oklch(58.23% 0.196 278.1)
XYZ	xyz(25.1088, 18.2658, 80.7837)
Luminance	0.1827 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6566EB #EBEA65

analogous

#65A9EB #6566EB #A765EB

triadic

#6566EB #EB6566 #66EB65

tetradic

#6566EB #EB65A9 #EBEA65 #65EBA7

square

#6566EB #EB65A9 #EBEA65 #65EBA7

split-complementary

#6566EB #EBA765 #A9EB65

monochromatic

#191ABD #2F30E4 #6566EB #9B9CF2 #D1D2F9

Accessibility & contrast

On white

4.51

#6566EB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#6566EB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6566EB

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6566EB	#FFFFFF	#000000	##000000
##6566EB	1.00	4.51	4.65	4.65
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#007CEF

Deuteranopia (green-blind)

#0071E8

Tritanopia (blue-blind)

#0F859F

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #6566eb;
/* rgb */ color: rgb(101, 102, 235);
/* oklch */ color: oklch(58.2% 0.196 278.1);

Tailwind

colors: {
  custom: {
    50: '#9c91f2',
    500: '#6566eb',
    950: '#000000',
  },
}

SCSS

$custom: #6566eb;
$custom-light: #9c91f2;
$custom-dark: #000000;

JSON

{
  "hex": "#6566eb",
  "rgb": {
    "r": 101,
    "g": 102,
    "b": 235
  },
  "hsl": {
    "h": 239.552,
    "s": 77.011,
    "l": 65.882
  },
  "oklch": {
    "l": 0.58231,
    "c": 0.19584,
    "h": 278.1
  },
  "luminance": 0.18268
}

Semantic roles & 50–950 ramp

primary

#6566EB

secondary

#ECECC0

accent

#D80CD9

background

#FAF8FE

surface

#F4F0FD

border

#CECBD5

text

#0F0D17

muted

#7F7D85

Preview Lab

Preview with #6566EB

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

Preview Lab → · Contrast checker → · Palette generator →