#5B66CD#5B66CD

#5B66CD is a mid, vivid blue. Relative luminance 0.161; OKLCH L 55.4% C 0.158 H 275.4°. Best body text is #FFFFFF at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#5B66CD
RGB	rgb(91, 102, 205)
HSL	hsl(234, 53%, 58%)
HSV	hsv(234, 56%, 80%)
CMYK	cmyk(55.6%, 50.2%, 0%, 19.6%)
CIE-LAB	lab(47.15, 25.61, -54.91)
CIE-LCH	lch(47.15, 60.59, 295.00°)
OKLab	oklab(55.43% 0.0149 -0.1569)
OKLCH	oklch(55.43% 0.158 275.4)
XYZ	xyz(20.0817, 16.1333, 59.8016)
Luminance	0.1613 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B66CD #CDC25B

analogous

#5B9FCD #5B66CD #895BCD

triadic

#5B66CD #CD5B66 #66CD5B

tetradic

#5B66CD #CD5B9F #CDC25B #5BCD89

square

#5B66CD #CD5B9F #CDC25B #5BCD89

split-complementary

#5B66CD #CD895B #9FCD5B

monochromatic

#293185 #3743B4 #5B66CD #8A92DB #B9BEEA

Accessibility & contrast

On white

4.97

#5B66CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.23

#5B66CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B66CD

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B66CD	#FFFFFF	#000000	##FFFFFF
##5B66CD	1.00	4.97	4.23	4.97
#FFFFFF	4.97	1.00	21.00	1.00
#000000	4.23	21.00	1.00	21.00
##FFFFFF	4.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3175D1

Deuteranopia (green-blind)

#1F6BCB

Tritanopia (blue-blind)

#1D7D90

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #5b66cd;
/* rgb */ color: rgb(91, 102, 205);
/* oklch */ color: oklch(55.4% 0.158 275.4);

Tailwind

colors: {
  custom: {
    50: '#9291dd',
    500: '#5b66cd',
    950: '#000000',
  },
}

SCSS

$custom: #5b66cd;
$custom-light: #9291dd;
$custom-dark: #000000;

JSON

{
  "hex": "#5b66cd",
  "rgb": {
    "r": 91,
    "g": 102,
    "b": 205
  },
  "hsl": {
    "h": 234.211,
    "s": 53.271,
    "l": 58.039
  },
  "oklch": {
    "l": 0.55427,
    "c": 0.15758,
    "h": 275.4
  },
  "luminance": 0.16135
}

Semantic roles & 50–950 ramp

primary

#5B66CD

secondary

#D9D4AB

accent

#CF4BDD

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #5B66CD

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

Preview Lab → · Contrast checker → · Palette generator →