#5B66DD#5B66DD

#5B66DD is a mid, vivid blue. Relative luminance 0.169; OKLCH L 56.5% C 0.179 H 275.1°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#5B66DD
RGB	rgb(91, 102, 221)
HSL	hsl(235, 66%, 61%)
HSV	hsv(235, 59%, 87%)
CMYK	cmyk(58.8%, 53.8%, 0%, 13.3%)
CIE-LAB	lab(48.19, 30.83, -62.35)
CIE-LCH	lch(48.19, 69.55, 296.31°)
OKLab	oklab(56.54% 0.016 -0.1787)
OKLCH	oklch(56.54% 0.179 275.1)
XYZ	xyz(22.1127, 16.9457, 70.4982)
Luminance	0.1695 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B66DD #DDD25B

analogous

#5BA7DD #5B66DD #915BDD

triadic

#5B66DD #DD5B66 #66DD5B

tetradic

#5B66DD #DD5BA7 #DDD25B #5BDD91

square

#5B66DD #DD5BA7 #DDD25B #5BDD91

split-complementary

#5B66DD #DD915B #A7DD5B

monochromatic

#212B9D #2B39D0 #5B66DD #8E95E8 #C0C5F2

Accessibility & contrast

On white

4.78

#5B66DD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#5B66DD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B66DD

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B66DD	#FFFFFF	#000000	##FFFFFF
##5B66DD	1.00	4.78	4.39	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1578E1

Deuteranopia (green-blind)

#006DDB

Tritanopia (blue-blind)

#008298

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #5b66dd;
/* rgb */ color: rgb(91, 102, 221);
/* oklch */ color: oklch(56.5% 0.179 275.1);

Tailwind

colors: {
  custom: {
    50: '#9591e8',
    500: '#5b66dd',
    950: '#000000',
  },
}

SCSS

$custom: #5b66dd;
$custom-light: #9591e8;
$custom-dark: #000000;

JSON

{
  "hex": "#5b66dd",
  "rgb": {
    "r": 91,
    "g": 102,
    "b": 221
  },
  "hsl": {
    "h": 234.923,
    "s": 65.657,
    "l": 61.176
  },
  "oklch": {
    "l": 0.56543,
    "c": 0.17946,
    "h": 275.1
  },
  "luminance": 0.16947
}

Semantic roles & 50–950 ramp

primary

#5B66DD

secondary

#E2DEB1

accent

#BE18CE

background

#F9F8FE

surface

#F2F0FD

border

#CCCBD5

text

#0E0C16

muted

#7E7D84

Preview Lab

Preview with #5B66DD

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

Preview Lab → · Contrast checker → · Palette generator →