#5B66BE#5B66BE

#5B66BE is a mid, vivid blue. Relative luminance 0.154; OKLCH L 54.4% C 0.136 H 275.5°. Best body text is #FFFFFF at 5.14:1 contrast (WCAG AA passes).

Color values

HEX	#5B66BE
RGB	rgb(91, 102, 190)
HSL	hsl(233, 43%, 55%)
HSV	hsv(233, 52%, 75%)
CMYK	cmyk(52.1%, 46.3%, 0%, 25.5%)
CIE-LAB	lab(46.24, 20.76, -47.73)
CIE-LCH	lch(46.24, 52.05, 293.51°)
OKLab	oklab(54.44% 0.0132 -0.1358)
OKLCH	oklch(54.44% 0.136 275.5)
XYZ	xyz(18.3571, 15.4434, 50.7188)
Luminance	0.1545 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B66BE #BEB35B

analogous

#5B98BE #5B66BE #815BBE

triadic

#5B66BE #BE5B66 #66BE5B

tetradic

#5B66BE #BE5B98 #BEB35B #5BBE81

square

#5B66BE #BE5B98 #BEB35B #5BBE81

split-complementary

#5B66BE #BE815B #98BE5B

monochromatic

#2D3572 #3E499D #5B66BE #878FCF #B3B8E1

Accessibility & contrast

On white

5.14

#5B66BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.09

#5B66BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B66BE

5.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B66BE	#FFFFFF	#000000	##FFFFFF
##5B66BE	1.00	5.14	4.09	5.14
#FFFFFF	5.14	1.00	21.00	1.00
#000000	4.09	21.00	1.00	21.00
##FFFFFF	5.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F72C1

Deuteranopia (green-blind)

#356ABC

Tritanopia (blue-blind)

#307989

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #5b66be;
/* rgb */ color: rgb(91, 102, 190);
/* oklch */ color: oklch(54.4% 0.136 275.5);

Tailwind

colors: {
  custom: {
    50: '#9091d2',
    500: '#5b66be',
    950: '#000000',
  },
}

SCSS

$custom: #5b66be;
$custom-light: #9091d2;
$custom-dark: #000000;

JSON

{
  "hex": "#5b66be",
  "rgb": {
    "r": 91,
    "g": 102,
    "b": 190
  },
  "hsl": {
    "h": 233.333,
    "s": 43.231,
    "l": 55.098
  },
  "oklch": {
    "l": 0.54441,
    "c": 0.13642,
    "h": 275.5
  },
  "luminance": 0.15445
}

Semantic roles & 50–950 ramp

primary

#5B66BE

secondary

#CFCBA6

accent

#C555D3

background

#F9F8FC

surface

#F1F0F9

border

#CBCBD2

text

#0D0C14

muted

#7E7D82

Preview Lab

Preview with #5B66BE

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

Preview Lab → · Contrast checker → · Palette generator →