#5166C5#5166C5

#5166C5 is a mid, vivid blue. Relative luminance 0.153; OKLCH L 54.2% C 0.149 H 271.3°. Best body text is #FFFFFF at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#5166C5
RGB	rgb(81, 102, 197)
HSL	hsl(229, 50%, 55%)
HSV	hsv(229, 59%, 77%)
CMYK	cmyk(58.9%, 48.2%, 0%, 22.7%)
CIE-LAB	lab(46.02, 20.98, -52.16)
CIE-LCH	lch(46.02, 56.22, 291.91°)
OKLab	oklab(54.25% 0.0033 -0.149)
OKLCH	oklch(54.25% 0.149 271.3)
XYZ	xyz(18.2194, 15.2819, 54.8021)
Luminance	0.1528 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166C5 #C5B051

analogous

#51A0C5 #5166C5 #7651C5

triadic

#5166C5 #C55166 #66C551

tetradic

#5166C5 #C551A0 #C5B051 #51C576

square

#5166C5 #C551A0 #C5B051 #51C576

split-complementary

#5166C5 #C57651 #A0C551

monochromatic

#273575 #364AA3 #5166C5 #7F8ED4 #ADB7E4

Accessibility & contrast

On white

5.18

#5166C5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.06

#5166C5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166C5

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166C5	#FFFFFF	#000000	##FFFFFF
##5166C5	1.00	5.18	4.06	5.18
#FFFFFF	5.18	1.00	21.00	1.00
#000000	4.06	21.00	1.00	21.00
##FFFFFF	5.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3772C8

Deuteranopia (green-blind)

#2468C3

Tritanopia (blue-blind)

#007B8C

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #5166c5;
/* rgb */ color: rgb(81, 102, 197);
/* oklch */ color: oklch(54.2% 0.149 271.3);

Tailwind

colors: {
  custom: {
    50: '#8c91d7',
    500: '#5166c5',
    950: '#000000',
  },
}

SCSS

$custom: #5166c5;
$custom-light: #8c91d7;
$custom-dark: #000000;

JSON

{
  "hex": "#5166c5",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 197
  },
  "hsl": {
    "h": 229.138,
    "s": 50,
    "l": 54.51
  },
  "oklch": {
    "l": 0.54245,
    "c": 0.14906,
    "h": 271.3
  },
  "luminance": 0.15283
}

Semantic roles & 50–950 ramp

primary

#5166C5

secondary

#D1C9A0

accent

#C04EDA

background

#F9F8FD

surface

#F1F0FA

border

#CBCBD3

text

#0D0C14

muted

#7E7D83

Preview Lab

Preview with #5166C5

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

Preview Lab → · Contrast checker → · Palette generator →