#5166CD#5166CD

#5166CD is a mid, vivid blue. Relative luminance 0.157; OKLCH L 54.8% C 0.160 H 271.5°. Best body text is #FFFFFF at 5.08:1 contrast (WCAG AA passes).

Color values

HEX	#5166CD
RGB	rgb(81, 102, 205)
HSL	hsl(230, 55%, 56%)
HSV	hsv(230, 60%, 80%)
CMYK	cmyk(60.5%, 50.2%, 0%, 19.6%)
CIE-LAB	lab(46.52, 23.68, -55.95)
CIE-LCH	lch(46.52, 60.75, 292.94°)
OKLab	oklab(54.79% 0.0042 -0.1602)
OKLCH	oklch(54.79% 0.16 271.5)
XYZ	xyz(19.1605, 15.6583, 59.7584)
Luminance	0.1566 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166CD #CDB851

analogous

#51A4CD #5166CD #7A51CD

triadic

#5166CD #CD5166 #66CD51

tetradic

#5166CD #CD51A4 #CDB851 #51CD7A

square

#5166CD #CD51A4 #CDB851 #51CD7A

split-complementary

#5166CD #CD7A51 #A4CD51

monochromatic

#25347F #3247AF #5166CD #8190DB #B0BAE8

Accessibility & contrast

On white

5.08

#5166CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.13

#5166CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166CD

5.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166CD	#FFFFFF	#000000	##FFFFFF
##5166CD	1.00	5.08	4.13	5.08
#FFFFFF	5.08	1.00	21.00	1.00
#000000	4.13	21.00	1.00	21.00
##FFFFFF	5.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E74D1

Deuteranopia (green-blind)

#1169CB

Tritanopia (blue-blind)

#007E90

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #5166cd;
/* rgb */ color: rgb(81, 102, 205);
/* oklch */ color: oklch(54.8% 0.160 271.5);

Tailwind

colors: {
  custom: {
    50: '#8d91dd',
    500: '#5166cd',
    950: '#000000',
  },
}

SCSS

$custom: #5166cd;
$custom-light: #8d91dd;
$custom-dark: #000000;

JSON

{
  "hex": "#5166cd",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 205
  },
  "hsl": {
    "h": 229.839,
    "s": 55.357,
    "l": 56.078
  },
  "oklch": {
    "l": 0.5479,
    "c": 0.16021,
    "h": 271.5
  },
  "luminance": 0.1566
}

Semantic roles & 50–950 ramp

primary

#5166CD

secondary

#D7CEA3

accent

#C549DF

background

#F9F8FD

surface

#F1F0FB

border

#CBCBD4

text

#0D0C15

muted

#7E7D83

Preview Lab

Preview with #5166CD

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

Preview Lab → · Contrast checker → · Palette generator →