#5166D1#5166D1

#5166D1 is a mid, vivid blue. Relative luminance 0.159; OKLCH L 55.1% C 0.166 H 271.6°. Best body text is #FFFFFF at 5.03:1 contrast (WCAG AA passes).

Color values

HEX	#5166D1
RGB	rgb(81, 102, 209)
HSL	hsl(230, 58%, 57%)
HSV	hsv(230, 61%, 82%)
CMYK	cmyk(61.2%, 51.2%, 0%, 18%)
CIE-LAB	lab(46.78, 25.03, -57.82)
CIE-LCH	lch(46.78, 63.01, 293.41°)
OKLab	oklab(55.07% 0.0046 -0.1657)
OKLCH	oklch(55.07% 0.166 271.6)
XYZ	xyz(19.6495, 15.8539, 62.3339)
Luminance	0.1586 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166D1 #D1BC51

analogous

#51A6D1 #5166D1 #7C51D1

triadic

#5166D1 #D15166 #66D151

tetradic

#5166D1 #D151A6 #D1BC51 #51D17C

square

#5166D1 #D151A6 #D1BC51 #51D17C

split-complementary

#5166D1 #D17C51 #A6D151

monochromatic

#233385 #3046B5 #5166D1 #8191DE #B2BBEB

Accessibility & contrast

On white

5.03

#5166D1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.17

#5166D1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166D1

5.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166D1	#FFFFFF	#000000	##FFFFFF
##5166D1	1.00	5.03	4.17	5.03
#FFFFFF	5.03	1.00	21.00	1.00
#000000	4.17	21.00	1.00	21.00
##FFFFFF	5.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2975D5

Deuteranopia (green-blind)

#0069CF

Tritanopia (blue-blind)

#007F92

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #5166d1;
/* rgb */ color: rgb(81, 102, 209);
/* oklch */ color: oklch(55.1% 0.166 271.6);

Tailwind

colors: {
  custom: {
    50: '#8d91e0',
    500: '#5166d1',
    950: '#000000',
  },
}

SCSS

$custom: #5166d1;
$custom-light: #8d91e0;
$custom-dark: #000000;

JSON

{
  "hex": "#5166d1",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 209
  },
  "hsl": {
    "h": 230.156,
    "s": 58.182,
    "l": 56.863
  },
  "oklch": {
    "l": 0.55069,
    "c": 0.16573,
    "h": 271.6
  },
  "luminance": 0.15856
}

Semantic roles & 50–950 ramp

primary

#5166D1

secondary

#D9D0A5

accent

#C846E1

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0D0C15

muted

#7E7D83

Preview Lab

Preview with #5166D1

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

Preview Lab → · Contrast checker → · Palette generator →