#5666EF#5666EF

#5666EF is a mid, highly saturated blue. Relative luminance 0.177; OKLCH L 57.6% C 0.204 H 273.1°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#5666EF
RGB	rgb(86, 102, 239)
HSL	hsl(234, 83%, 64%)
HSV	hsv(234, 64%, 94%)
CMYK	cmyk(64%, 57.3%, 0%, 6.3%)
CIE-LAB	lab(49.14, 35.95, -70.96)
CIE-LCH	lch(49.14, 79.55, 296.87°)
OKLab	oklab(57.57% 0.0111 -0.2042)
OKLCH	oklch(57.57% 0.205 273.1)
XYZ	xyz(24.1639, 17.7111, 83.7898)
Luminance	0.1771 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5666EF #EFDF56

analogous

#56B3EF #5666EF #9256EF

triadic

#5666EF #EF5666 #66EF56

tetradic

#5666EF #EF56B3 #EFDF56 #56EF92

square

#5666EF #EF56B3 #EFDF56 #56EF92

split-complementary

#5666EF #EF9256 #B3EF56

monochromatic

#1223B9 #1E33EA #5666EF #8E99F4 #C6CBFA

Accessibility & contrast

On white

4.62

#5666EF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#5666EF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #5666EF

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5666EF	#FFFFFF	#000000	##FFFFFF
##5666EF	1.00	4.62	4.54	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#007CF4

Deuteranopia (green-blind)

#006EEC

Tritanopia (blue-blind)

#0087A1

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #5666ef;
/* rgb */ color: rgb(86, 102, 239);
/* oklch */ color: oklch(57.6% 0.204 273.1);

Tailwind

colors: {
  custom: {
    50: '#9591f5',
    500: '#5666ef',
    950: '#000000',
  },
}

SCSS

$custom: #5666ef;
$custom-light: #9591f5;
$custom-dark: #000000;

JSON

{
  "hex": "#5666ef",
  "rgb": {
    "r": 86,
    "g": 102,
    "b": 239
  },
  "hsl": {
    "h": 233.725,
    "s": 82.703,
    "l": 63.725
  },
  "oklch": {
    "l": 0.57571,
    "c": 0.2045,
    "h": 273.1
  },
  "luminance": 0.17713
}

Semantic roles & 50–950 ramp

primary

#5666EF

secondary

#EBE6B5

accent

#C806DF

background

#F9F8FF

surface

#F2F0FF

border

#CCCBD7

text

#0F0C17

muted

#7E7D85

Preview Lab

Preview with #5666EF

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

Preview Lab → · Contrast checker → · Palette generator →