#5166CB#5166CB

#5166CB is a mid, vivid blue. Relative luminance 0.156; OKLCH L 54.7% C 0.157 H 271.5°. Best body text is #FFFFFF at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#5166CB
RGB	rgb(81, 102, 203)
HSL	hsl(230, 54%, 56%)
HSV	hsv(230, 60%, 80%)
CMYK	cmyk(60.1%, 49.8%, 0%, 20.4%)
CIE-LAB	lab(46.39, 23.00, -55.01)
CIE-LCH	lch(46.39, 59.62, 292.69°)
OKLab	oklab(54.65% 0.004 -0.1574)
OKLCH	oklch(54.65% 0.157 271.5)
XYZ	xyz(18.9206, 15.5623, 58.4951)
Luminance	0.1556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166CB #CBB651

analogous

#51A3CB #5166CB #7951CB

triadic

#5166CB #CB5166 #66CB51

tetradic

#5166CB #CB51A3 #CBB651 #51CB79

square

#5166CB #CB51A3 #CBB651 #51CB79

split-complementary

#5166CB #CB7951 #A3CB51

monochromatic

#25347C #3348AC #5166CB #808FD9 #AFB9E7

Accessibility & contrast

On white

5.11

#5166CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.11

#5166CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166CB

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166CB	#FFFFFF	#000000	##FFFFFF
##5166CB	1.00	5.11	4.11	5.11
#FFFFFF	5.11	1.00	21.00	1.00
#000000	4.11	21.00	1.00	21.00
##FFFFFF	5.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3074CF

Deuteranopia (green-blind)

#1769C9

Tritanopia (blue-blind)

#007D8F

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #5166cb;
/* rgb */ color: rgb(81, 102, 203);
/* oklch */ color: oklch(54.7% 0.157 271.5);

Tailwind

colors: {
  custom: {
    50: '#8c91db',
    500: '#5166cb',
    950: '#000000',
  },
}

SCSS

$custom: #5166cb;
$custom-light: #8c91db;
$custom-dark: #000000;

JSON

{
  "hex": "#5166cb",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 203
  },
  "hsl": {
    "h": 229.672,
    "s": 53.982,
    "l": 55.686
  },
  "oklch": {
    "l": 0.54652,
    "c": 0.15744,
    "h": 271.5
  },
  "luminance": 0.15564
}

Semantic roles & 50–950 ramp

primary

#5166CB

secondary

#D5CDA3

accent

#C44ADD

background

#F9F8FD

surface

#F1F0FB

border

#CBCBD4

text

#0D0C15

muted

#7E7D83

Preview Lab

Preview with #5166CB

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

Preview Lab → · Contrast checker → · Palette generator →