#5166B0#5166B0

#5166B0 is a mid, moderate blue. Relative luminance 0.144; OKLCH L 52.9% C 0.119 H 270.0°. Best body text is #FFFFFF at 5.42:1 contrast (WCAG AA passes).

Color values

HEX	#5166B0
RGB	rgb(81, 102, 176)
HSL	hsl(227, 38%, 50%)
HSV	hsv(227, 54%, 69%)
CMYK	cmyk(54%, 42%, 0%, 31%)
CIE-LAB	lab(44.78, 13.97, -41.94)
CIE-LCH	lch(44.78, 44.21, 288.42°)
OKLab	oklab(52.9% 0 -0.119)
OKLCH	oklch(52.9% 0.119 270)
XYZ	xyz(15.9786, 14.3855, 43.0006)
Luminance	0.1439 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166B0 #B09B51

analogous

#5195B0 #5166B0 #6C51B0

triadic

#5166B0 #B05166 #66B051

tetradic

#5166B0 #B05195 #B09B51 #51B06C

square

#5166B0 #B05195 #B09B51 #51B06C

split-complementary

#5166B0 #B06C51 #95B051

monochromatic

#2A355D #3D4D87 #5166B0 #7B8BC3 #A5B0D6

Accessibility & contrast

On white

5.42

#5166B0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.88

#5166B0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166B0

5.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166B0	#FFFFFF	#000000	##FFFFFF
##5166B0	1.00	5.42	3.88	5.42
#FFFFFF	5.42	1.00	21.00	1.00
#000000	3.88	21.00	1.00	21.00
##FFFFFF	5.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#476EB3

Deuteranopia (green-blind)

#3C66AE

Tritanopia (blue-blind)

#217682

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #5166b0;
/* rgb */ color: rgb(81, 102, 176);
/* oklch */ color: oklch(52.9% 0.119 270.0);

Tailwind

colors: {
  custom: {
    50: '#8891c8',
    500: '#5166b0',
    950: '#000000',
  },
}

SCSS

$custom: #5166b0;
$custom-light: #8891c8;
$custom-dark: #000000;

JSON

{
  "hex": "#5166b0",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 176
  },
  "hsl": {
    "h": 226.737,
    "s": 37.549,
    "l": 50.392
  },
  "oklch": {
    "l": 0.529,
    "c": 0.11902,
    "h": 270
  },
  "luminance": 0.14387
}

Semantic roles & 50–950 ramp

primary

#5166B0

secondary

#C4BA99

accent

#B45ACE

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0C0C13

muted

#7D7D82

Preview Lab

Preview with #5166B0

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

Preview Lab → · Contrast checker → · Palette generator →