#5B66EC#5B66EC

#5B66EC is a mid, vivid blue. Relative luminance 0.178; OKLCH L 57.6% C 0.199 H 274.7°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#5B66EC
RGB	rgb(91, 102, 236)
HSL	hsl(235, 79%, 64%)
HSV	hsv(235, 61%, 93%)
CMYK	cmyk(61.4%, 56.8%, 0%, 7.5%)
CIE-LAB	lab(49.23, 35.75, -69.13)
CIE-LCH	lch(49.23, 77.82, 297.35°)
OKLab	oklab(57.65% 0.0164 -0.1987)
OKLCH	oklch(57.65% 0.199 274.7)
XYZ	xyz(24.2011, 17.7810, 81.4974)
Luminance	0.1778 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B66EC #ECE15B

analogous

#5BAFEC #5B66EC #995BEC

triadic

#5B66EC #EC5B66 #66EC5B

tetradic

#5B66EC #EC5BAF #ECE15B #5BEC99

square

#5B66EC #EC5BAF #ECE15B #5BEC99

split-complementary

#5B66EC #EC995B #AFEC5B

monochromatic

#1522B7 #2433E6 #5B66EC #9299F2 #C9CCF9

Accessibility & contrast

On white

4.61

#5B66EC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#5B66EC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #5B66EC

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B66EC	#FFFFFF	#000000	##FFFFFF
##5B66EC	1.00	4.61	4.56	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#007BF1

Deuteranopia (green-blind)

#006FE9

Tritanopia (blue-blind)

#00869F

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #5b66ec;
/* rgb */ color: rgb(91, 102, 236);
/* oklch */ color: oklch(57.6% 0.199 274.7);

Tailwind

colors: {
  custom: {
    50: '#9791f3',
    500: '#5b66ec',
    950: '#000000',
  },
}

SCSS

$custom: #5b66ec;
$custom-light: #9791f3;
$custom-dark: #000000;

JSON

{
  "hex": "#5b66ec",
  "rgb": {
    "r": 91,
    "g": 102,
    "b": 236
  },
  "hsl": {
    "h": 235.448,
    "s": 79.235,
    "l": 64.118
  },
  "oklch": {
    "l": 0.57646,
    "c": 0.19937,
    "h": 274.7
  },
  "luminance": 0.17783
}

Semantic roles & 50–950 ramp

primary

#5B66EC

secondary

#EBE7B8

accent

#CC0ADC

background

#FAF8FF

surface

#F3F0FE

border

#CDCBD6

text

#0F0C17

muted

#7F7D85

Preview Lab

Preview with #5B66EC

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

Preview Lab → · Contrast checker → · Palette generator →