#5166B7#5166B7

#5166B7 is a mid, vivid blue. Relative luminance 0.147; OKLCH L 53.3% C 0.129 H 270.6°. Best body text is #FFFFFF at 5.34:1 contrast (WCAG AA passes).

Color values

HEX	#5166B7
RGB	rgb(81, 102, 183)
HSL	hsl(228, 41%, 52%)
HSV	hsv(228, 56%, 72%)
CMYK	cmyk(55.7%, 44.3%, 0%, 28.2%)
CIE-LAB	lab(45.18, 16.28, -45.39)
CIE-LCH	lch(45.18, 48.23, 289.73°)
OKLab	oklab(53.33% 0.0013 -0.1291)
OKLCH	oklch(53.33% 0.129 270.6)
XYZ	xyz(16.6891, 14.6698, 46.7427)
Luminance	0.1467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166B7 #B7A251

analogous

#5199B7 #5166B7 #6F51B7

triadic

#5166B7 #B75166 #66B751

tetradic

#5166B7 #B75199 #B7A251 #51B76F

square

#5166B7 #B75199 #B7A251 #51B76F

split-complementary

#5166B7 #B76F51 #99B751

monochromatic

#293664 #3B4D8F #5166B7 #7C8CC9 #A8B2DB

Accessibility & contrast

On white

5.34

#5166B7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.93

#5166B7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166B7

5.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166B7	#FFFFFF	#000000	##FFFFFF
##5166B7	1.00	5.34	3.93	5.34
#FFFFFF	5.34	1.00	21.00	1.00
#000000	3.93	21.00	1.00	21.00
##FFFFFF	5.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4370BA

Deuteranopia (green-blind)

#3667B5

Tritanopia (blue-blind)

#177885

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #5166b7;
/* rgb */ color: rgb(81, 102, 183);
/* oklch */ color: oklch(53.3% 0.129 270.6);

Tailwind

colors: {
  custom: {
    50: '#8991cd',
    500: '#5166b7',
    950: '#000000',
  },
}

SCSS

$custom: #5166b7;
$custom-light: #8991cd;
$custom-dark: #000000;

JSON

{
  "hex": "#5166b7",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 183
  },
  "hsl": {
    "h": 227.647,
    "s": 41.463,
    "l": 51.765
  },
  "oklch": {
    "l": 0.53334,
    "c": 0.12915,
    "h": 270.6
  },
  "luminance": 0.14671
}

Semantic roles & 50–950 ramp

primary

#5166B7

secondary

#C8BF9C

accent

#B857D1

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0C13

muted

#7D7D82

Preview Lab

Preview with #5166B7

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

Preview Lab → · Contrast checker → · Palette generator →