#5166B2#5166B2

#5166B2 is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.0% C 0.122 H 270.2°. Best body text is #FFFFFF at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#5166B2
RGB	rgb(81, 102, 178)
HSL	hsl(227, 39%, 51%)
HSV	hsv(227, 54%, 70%)
CMYK	cmyk(54.5%, 42.7%, 0%, 30.2%)
CIE-LAB	lab(44.89, 14.63, -42.93)
CIE-LCH	lch(44.89, 45.36, 288.81°)
OKLab	oklab(53.02% 0.0004 -0.1219)
OKLCH	oklch(53.02% 0.122 270.2)
XYZ	xyz(16.1780, 14.4653, 44.0504)
Luminance	0.1447 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166B2 #B29D51

analogous

#5196B2 #5166B2 #6C51B2

triadic

#5166B2 #B25166 #66B251

tetradic

#5166B2 #B25196 #B29D51 #51B26C

square

#5166B2 #B25196 #B29D51 #51B26C

split-complementary

#5166B2 #B26C51 #96B251

monochromatic

#2A355F #3D4D89 #5166B2 #7B8BC5 #A6B1D8

Accessibility & contrast

On white

5.39

#5166B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.89

#5166B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166B2

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166B2	#FFFFFF	#000000	##FFFFFF
##5166B2	1.00	5.39	3.89	5.39
#FFFFFF	5.39	1.00	21.00	1.00
#000000	3.89	21.00	1.00	21.00
##FFFFFF	5.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#466FB5

Deuteranopia (green-blind)

#3B66B0

Tritanopia (blue-blind)

#1F7783

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #5166b2;
/* rgb */ color: rgb(81, 102, 178);
/* oklch */ color: oklch(53.0% 0.122 270.2);

Tailwind

colors: {
  custom: {
    50: '#8991c9',
    500: '#5166b2',
    950: '#000000',
  },
}

SCSS

$custom: #5166b2;
$custom-light: #8991c9;
$custom-dark: #000000;

JSON

{
  "hex": "#5166b2",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 178
  },
  "hsl": {
    "h": 227.01,
    "s": 38.645,
    "l": 50.784
  },
  "oklch": {
    "l": 0.53023,
    "c": 0.12192,
    "h": 270.2
  },
  "luminance": 0.14466
}

Semantic roles & 50–950 ramp

primary

#5166B2

secondary

#C5BC9A

accent

#B559CF

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0C0C13

muted

#7D7D82

Preview Lab

Preview with #5166B2

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

Preview Lab → · Contrast checker → · Palette generator →