#5B66EB#5B66EB

#5B66EB is a mid, vivid blue. Relative luminance 0.177; OKLCH L 57.6% C 0.198 H 274.7°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#5B66EB
RGB	rgb(91, 102, 235)
HSL	hsl(235, 78%, 64%)
HSV	hsv(235, 61%, 92%)
CMYK	cmyk(61.3%, 56.6%, 0%, 7.8%)
CIE-LAB	lab(49.16, 35.42, -68.68)
CIE-LCH	lch(49.16, 77.27, 297.28°)
OKLab	oklab(57.57% 0.0164 -0.1974)
OKLCH	oklch(57.57% 0.198 274.7)
XYZ	xyz(24.0562, 17.7231, 80.7344)
Luminance	0.1772 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B66EB #EBE05B

analogous

#5BAEEB #5B66EB #985BEB

triadic

#5B66EB #EB5B66 #66EB5B

tetradic

#5B66EB #EB5BAE #EBE05B #5BEB98

square

#5B66EB #EB5BAE #EBE05B #5BEB98

split-complementary

#5B66EB #EB985B #AEEB5B

monochromatic

#1622B5 #2433E4 #5B66EB #9299F2 #C8CCF8

Accessibility & contrast

On white

4.62

#5B66EB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#5B66EB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #5B66EB

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B66EB	#FFFFFF	#000000	##FFFFFF
##5B66EB	1.00	4.62	4.55	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#007BEF

Deuteranopia (green-blind)

#006FE8

Tritanopia (blue-blind)

#00869F

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #5b66eb;
/* rgb */ color: rgb(91, 102, 235);
/* oklch */ color: oklch(57.6% 0.198 274.7);

Tailwind

colors: {
  custom: {
    50: '#9791f2',
    500: '#5b66eb',
    950: '#000000',
  },
}

SCSS

$custom: #5b66eb;
$custom-light: #9791f2;
$custom-dark: #000000;

JSON

{
  "hex": "#5b66eb",
  "rgb": {
    "r": 91,
    "g": 102,
    "b": 235
  },
  "hsl": {
    "h": 235.417,
    "s": 78.261,
    "l": 63.922
  },
  "oklch": {
    "l": 0.57571,
    "c": 0.19805,
    "h": 274.7
  },
  "luminance": 0.17725
}

Semantic roles & 50–950 ramp

primary

#5B66EB

secondary

#EAE6B8

accent

#CB0BDB

background

#FAF8FE

surface

#F3F0FD

border

#CDCBD5

text

#0F0C17

muted

#7F7D85

Preview Lab

Preview with #5B66EB

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

Preview Lab → · Contrast checker → · Palette generator →