#5B66D2#5B66D2

#5B66D2 is a mid, vivid blue. Relative luminance 0.164; OKLCH L 55.8% C 0.164 H 275.3°. Best body text is #FFFFFF at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#5B66D2
RGB	rgb(91, 102, 210)
HSL	hsl(234, 57%, 59%)
HSV	hsv(234, 57%, 82%)
CMYK	cmyk(56.7%, 51.4%, 0%, 17.6%)
CIE-LAB	lab(47.47, 27.23, -57.26)
CIE-LCH	lch(47.47, 63.41, 295.44°)
OKLab	oklab(55.77% 0.0153 -0.1638)
OKLCH	oklch(55.77% 0.164 275.3)
XYZ	xyz(20.6949, 16.3785, 63.0311)
Luminance	0.1638 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B66D2 #D2C75B

analogous

#5BA2D2 #5B66D2 #8C5BD2

triadic

#5B66D2 #D25B66 #66D25B

tetradic

#5B66D2 #D25BA2 #D2C75B #5BD28C

square

#5B66D2 #D25BA2 #D2C75B #5BD28C

split-complementary

#5B66D2 #D28C5B #A2D25B

monochromatic

#26308C #3440BC #5B66D2 #8B93DF #BBC0EC

Accessibility & contrast

On white

4.91

#5B66D2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#5B66D2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B66D2

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B66D2	#FFFFFF	#000000	##FFFFFF
##5B66D2	1.00	4.91	4.28	4.91
#FFFFFF	4.91	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B76D6

Deuteranopia (green-blind)

#126CD0

Tritanopia (blue-blind)

#127F92

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #5b66d2;
/* rgb */ color: rgb(91, 102, 210);
/* oklch */ color: oklch(55.8% 0.164 275.3);

Tailwind

colors: {
  custom: {
    50: '#9391e0',
    500: '#5b66d2',
    950: '#000000',
  },
}

SCSS

$custom: #5b66d2;
$custom-light: #9391e0;
$custom-dark: #000000;

JSON

{
  "hex": "#5b66d2",
  "rgb": {
    "r": 91,
    "g": 102,
    "b": 210
  },
  "hsl": {
    "h": 234.454,
    "s": 56.938,
    "l": 59.02
  },
  "oklch": {
    "l": 0.55768,
    "c": 0.16449,
    "h": 275.3
  },
  "luminance": 0.1638
}

Semantic roles & 50–950 ramp

primary

#5B66D2

secondary

#DCD7AD

accent

#D248E0

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #5B66D2

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

Preview Lab → · Contrast checker → · Palette generator →