#5166BD#5166BD

#5166BD is a mid, vivid blue. Relative luminance 0.149; OKLCH L 53.7% C 0.138 H 270.9°. Best body text is #FFFFFF at 5.27:1 contrast (WCAG AA passes).

Color values

HEX	#5166BD
RGB	rgb(81, 102, 189)
HSL	hsl(228, 45%, 53%)
HSV	hsv(228, 57%, 74%)
CMYK	cmyk(57.1%, 46%, 0%, 25.9%)
CIE-LAB	lab(45.53, 18.29, -48.32)
CIE-LCH	lch(45.53, 51.66, 290.73°)
OKLab	oklab(53.72% 0.0022 -0.1377)
OKLCH	oklch(53.72% 0.138 270.9)
XYZ	xyz(17.3270, 14.9249, 50.1020)
Luminance	0.1493 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166BD #BDA851

analogous

#519CBD #5166BD #7251BD

triadic

#5166BD #BD5166 #66BD51

tetradic

#5166BD #BD519C #BDA851 #51BD72

square

#5166BD #BD519C #BDA851 #51BD72

split-complementary

#5166BD #BD7251 #9CBD51

monochromatic

#29366B #394C97 #5166BD #7D8DCE #AAB4DF

Accessibility & contrast

On white

5.27

#5166BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.99

#5166BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166BD

5.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166BD	#FFFFFF	#000000	##FFFFFF
##5166BD	1.00	5.27	3.99	5.27
#FFFFFF	5.27	1.00	21.00	1.00
#000000	3.99	21.00	1.00	21.00
##FFFFFF	5.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E71C0

Deuteranopia (green-blind)

#2F67BB

Tritanopia (blue-blind)

#077988

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #5166bd;
/* rgb */ color: rgb(81, 102, 189);
/* oklch */ color: oklch(53.7% 0.138 270.9);

Tailwind

colors: {
  custom: {
    50: '#8a91d1',
    500: '#5166bd',
    950: '#000000',
  },
}

SCSS

$custom: #5166bd;
$custom-light: #8a91d1;
$custom-dark: #000000;

JSON

{
  "hex": "#5166bd",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 189
  },
  "hsl": {
    "h": 228.333,
    "s": 45,
    "l": 52.941
  },
  "oklch": {
    "l": 0.53717,
    "c": 0.13774,
    "h": 270.9
  },
  "luminance": 0.14926
}

Semantic roles & 50–950 ramp

primary

#5166BD

secondary

#CCC39E

accent

#BB53D5

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0C14

muted

#7D7D82

Preview Lab

Preview with #5166BD

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

Preview Lab → · Contrast checker → · Palette generator →