#5B66F4#5B66F4

#5B66F4 is a mid, highly saturated blue. Relative luminance 0.183; OKLCH L 58.3% C 0.210 H 274.5°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#5B66F4
RGB	rgb(91, 102, 244)
HSL	hsl(236, 87%, 66%)
HSV	hsv(236, 63%, 96%)
CMYK	cmyk(62.7%, 58.2%, 0%, 4.3%)
CIE-LAB	lab(49.81, 38.37, -72.67)
CIE-LCH	lch(49.81, 82.17, 297.84°)
OKLab	oklab(58.26% 0.0164 -0.2091)
OKLCH	oklch(58.26% 0.21 274.5)
XYZ	xyz(25.3895, 18.2564, 87.7563)
Luminance	0.1826 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B66F4 #F4E95B

analogous

#5BB3F4 #5B66F4 #9C5BF4

triadic

#5B66F4 #F45B66 #66F45B

tetradic

#5B66F4 #F45BB3 #F4E95B #5BF49C

square

#5B66F4 #F45BB3 #F4E95B #5BF49C

split-complementary

#5B66F4 #F49C5B #B3F45B

monochromatic

#0D1BC7 #2230F0 #5B66F4 #949CF8 #CED1FC

Accessibility & contrast

On white

4.51

#5B66F4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#5B66F4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5B66F4

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B66F4	#FFFFFF	#000000	##000000
##5B66F4	1.00	4.51	4.65	4.65
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#007DF9

Deuteranopia (green-blind)

#0070F1

Tritanopia (blue-blind)

#0089A3

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #5b66f4;
/* rgb */ color: rgb(91, 102, 244);
/* oklch */ color: oklch(58.3% 0.210 274.5);

Tailwind

colors: {
  custom: {
    50: '#9891f9',
    500: '#5b66f4',
    950: '#000000',
  },
}

SCSS

$custom: #5b66f4;
$custom-light: #9891f9;
$custom-dark: #000000;

JSON

{
  "hex": "#5b66f4",
  "rgb": {
    "r": 91,
    "g": 102,
    "b": 244
  },
  "hsl": {
    "h": 235.686,
    "s": 87.429,
    "l": 65.686
  },
  "oklch": {
    "l": 0.58255,
    "c": 0.20974,
    "h": 274.5
  },
  "luminance": 0.18259
}

Semantic roles & 50–950 ramp

primary

#5B66F4

secondary

#EFEBBC

accent

#D402E4

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#0F0D17

muted

#7F7D85

Preview Lab

Preview with #5B66F4

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

Preview Lab → · Contrast checker → · Palette generator →