#5166B6#5166B6

#5166B6 is a mid, vivid blue. Relative luminance 0.146; OKLCH L 53.3% C 0.128 H 270.5°. Best body text is #FFFFFF at 5.35:1 contrast (WCAG AA passes).

Color values

HEX	#5166B6
RGB	rgb(81, 102, 182)
HSL	hsl(228, 41%, 52%)
HSV	hsv(228, 55%, 71%)
CMYK	cmyk(55.5%, 44%, 0%, 28.6%)
CIE-LAB	lab(45.12, 15.95, -44.90)
CIE-LCH	lch(45.12, 47.65, 289.56°)
OKLab	oklab(53.27% 0.0011 -0.1277)
OKLCH	oklch(53.27% 0.128 270.5)
XYZ	xyz(16.5854, 14.6283, 46.1965)
Luminance	0.1463 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166B6 #B6A151

analogous

#5199B6 #5166B6 #6F51B6

triadic

#5166B6 #B65166 #66B651

tetradic

#5166B6 #B65199 #B6A151 #51B66F

square

#5166B6 #B65199 #B6A151 #51B66F

split-complementary

#5166B6 #B66F51 #99B651

monochromatic

#2A3663 #3C4D8E #5166B6 #7C8CC8 #A7B2DA

Accessibility & contrast

On white

5.35

#5166B6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.93

#5166B6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166B6

5.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166B6	#FFFFFF	#000000	##FFFFFF
##5166B6	1.00	5.35	3.93	5.35
#FFFFFF	5.35	1.00	21.00	1.00
#000000	3.93	21.00	1.00	21.00
##FFFFFF	5.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#436FB9

Deuteranopia (green-blind)

#3767B4

Tritanopia (blue-blind)

#197885

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #5166b6;
/* rgb */ color: rgb(81, 102, 182);
/* oklch */ color: oklch(53.3% 0.128 270.5);

Tailwind

colors: {
  custom: {
    50: '#8991cc',
    500: '#5166b6',
    950: '#000000',
  },
}

SCSS

$custom: #5166b6;
$custom-light: #8991cc;
$custom-dark: #000000;

JSON

{
  "hex": "#5166b6",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 182
  },
  "hsl": {
    "h": 227.525,
    "s": 40.891,
    "l": 51.569
  },
  "oklch": {
    "l": 0.53271,
    "c": 0.1277,
    "h": 270.5
  },
  "luminance": 0.14629
}

Semantic roles & 50–950 ramp

primary

#5166B6

secondary

#C8BE9B

accent

#B757D1

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0C13

muted

#7D7D82

Preview Lab

Preview with #5166B6

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

Preview Lab → · Contrast checker → · Palette generator →