#5B66DE#5B66DE

#5B66DE is a mid, vivid blue. Relative luminance 0.170; OKLCH L 56.6% C 0.181 H 275.1°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#5B66DE
RGB	rgb(91, 102, 222)
HSL	hsl(235, 66%, 61%)
HSV	hsv(235, 59%, 87%)
CMYK	cmyk(59%, 54.1%, 0%, 12.9%)
CIE-LAB	lab(48.26, 31.16, -62.81)
CIE-LCH	lch(48.26, 70.11, 296.39°)
OKLab	oklab(56.62% 0.016 -0.1801)
OKLCH	oklch(56.62% 0.181 275.1)
XYZ	xyz(22.2463, 16.9991, 71.2019)
Luminance	0.1700 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B66DE #DED35B

analogous

#5BA8DE #5B66DE #925BDE

triadic

#5B66DE #DE5B66 #66DE5B

tetradic

#5B66DE #DE5BA8 #DED35B #5BDE92

square

#5B66DE #DE5BA8 #DED35B #5BDE92

split-complementary

#5B66DE #DE925B #A8DE5B

monochromatic

#202B9F #2A38D2 #5B66DE #8E96E8 #C1C5F3

Accessibility & contrast

On white

4.77

#5B66DE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#5B66DE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B66DE

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B66DE	#FFFFFF	#000000	##FFFFFF
##5B66DE	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1278E2

Deuteranopia (green-blind)

#006DDC

Tritanopia (blue-blind)

#008298

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #5b66de;
/* rgb */ color: rgb(91, 102, 222);
/* oklch */ color: oklch(56.6% 0.181 275.1);

Tailwind

colors: {
  custom: {
    50: '#9591e9',
    500: '#5b66de',
    950: '#000000',
  },
}

SCSS

$custom: #5b66de;
$custom-light: #9591e9;
$custom-dark: #000000;

JSON

{
  "hex": "#5b66de",
  "rgb": {
    "r": 91,
    "g": 102,
    "b": 222
  },
  "hsl": {
    "h": 234.962,
    "s": 66.497,
    "l": 61.373
  },
  "oklch": {
    "l": 0.56615,
    "c": 0.1808,
    "h": 275.1
  },
  "luminance": 0.17001
}

Semantic roles & 50–950 ramp

primary

#5B66DE

secondary

#E3DFB2

accent

#BF17CE

background

#F9F8FE

surface

#F2F0FD

border

#CCCBD5

text

#0E0C16

muted

#7E7D84

Preview Lab

Preview with #5B66DE

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

Preview Lab → · Contrast checker → · Palette generator →