#5166D9#5166D9

#5166D9 is a mid, vivid blue. Relative luminance 0.163; OKLCH L 55.6% C 0.177 H 271.7°. Best body text is #FFFFFF at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#5166D9
RGB	rgb(81, 102, 217)
HSL	hsl(231, 64%, 58%)
HSV	hsv(231, 63%, 85%)
CMYK	cmyk(62.7%, 53%, 0%, 14.9%)
CIE-LAB	lab(47.31, 27.75, -61.53)
CIE-LCH	lch(47.31, 67.49, 294.28°)
OKLab	oklab(55.64% 0.0052 -0.1766)
OKLCH	oklch(55.64% 0.177 271.7)
XYZ	xyz(20.6649, 16.2601, 67.6817)
Luminance	0.1626 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166D9 #D9C451

analogous

#51AAD9 #5166D9 #8051D9

triadic

#5166D9 #D95166 #66D951

tetradic

#5166D9 #D951AA #D9C451 #51D980

square

#5166D9 #D951AA #D9C451 #51D980

split-complementary

#5166D9 #D98051 #AAD951

monochromatic

#1F3190 #2A42C2 #5166D9 #8392E4 #B5BEEF

Accessibility & contrast

On white

4.94

#5166D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.25

#5166D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166D9

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166D9	#FFFFFF	#000000	##FFFFFF
##5166D9	1.00	4.94	4.25	4.94
#FFFFFF	4.94	1.00	21.00	1.00
#000000	4.25	21.00	1.00	21.00
##FFFFFF	4.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A76DD

Deuteranopia (green-blind)

#006AD7

Tritanopia (blue-blind)

#008196

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #5166d9;
/* rgb */ color: rgb(81, 102, 217);
/* oklch */ color: oklch(55.6% 0.177 271.7);

Tailwind

colors: {
  custom: {
    50: '#8f91e5',
    500: '#5166d9',
    950: '#000000',
  },
}

SCSS

$custom: #5166d9;
$custom-light: #8f91e5;
$custom-dark: #000000;

JSON

{
  "hex": "#5166d9",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 217
  },
  "hsl": {
    "h": 230.735,
    "s": 64.151,
    "l": 58.431
  },
  "oklch": {
    "l": 0.55639,
    "c": 0.17665,
    "h": 271.7
  },
  "luminance": 0.16262
}

Semantic roles & 50–950 ramp

primary

#5166D9

secondary

#DED6A8

accent

#CD41E7

background

#F9F8FE

surface

#F2F0FC

border

#CCCBD5

text

#0E0C16

muted

#7E7D84

Preview Lab

Preview with #5166D9

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

Preview Lab → · Contrast checker → · Palette generator →