#5166B3#5166B3

#5166B3 is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.1% C 0.123 H 270.3°. Best body text is #FFFFFF at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#5166B3
RGB	rgb(81, 102, 179)
HSL	hsl(227, 39%, 51%)
HSV	hsv(227, 55%, 70%)
CMYK	cmyk(54.7%, 43%, 0%, 29.8%)
CIE-LAB	lab(44.95, 14.96, -43.43)
CIE-LCH	lch(44.95, 45.93, 289.01°)
OKLab	oklab(53.08% 0.0006 -0.1234)
OKLCH	oklch(53.08% 0.123 270.3)
XYZ	xyz(16.2787, 14.5056, 44.5811)
Luminance	0.1451 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166B3 #B39E51

analogous

#5197B3 #5166B3 #6D51B3

triadic

#5166B3 #B35166 #66B351

tetradic

#5166B3 #B35197 #B39E51 #51B36D

square

#5166B3 #B35197 #B39E51 #51B36D

split-complementary

#5166B3 #B36D51 #97B351

monochromatic

#2A3560 #3C4D8A #5166B3 #7C8BC6 #A6B1D8

Accessibility & contrast

On white

5.38

#5166B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.90

#5166B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166B3

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166B3	#FFFFFF	#000000	##FFFFFF
##5166B3	1.00	5.38	3.90	5.38
#FFFFFF	5.38	1.00	21.00	1.00
#000000	3.90	21.00	1.00	21.00
##FFFFFF	5.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#456FB6

Deuteranopia (green-blind)

#3A66B1

Tritanopia (blue-blind)

#1D7784

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #5166b3;
/* rgb */ color: rgb(81, 102, 179);
/* oklch */ color: oklch(53.1% 0.123 270.3);

Tailwind

colors: {
  custom: {
    50: '#8991ca',
    500: '#5166b3',
    950: '#000000',
  },
}

SCSS

$custom: #5166b3;
$custom-light: #8991ca;
$custom-dark: #000000;

JSON

{
  "hex": "#5166b3",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 179
  },
  "hsl": {
    "h": 227.143,
    "s": 39.2,
    "l": 50.98
  },
  "oklch": {
    "l": 0.53084,
    "c": 0.12337,
    "h": 270.3
  },
  "luminance": 0.14507
}

Semantic roles & 50–950 ramp

primary

#5166B3

secondary

#C6BC9A

accent

#B659CF

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0C0C13

muted

#7D7D82

Preview Lab

Preview with #5166B3

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

Preview Lab → · Contrast checker → · Palette generator →