#5166B5#5166B5

#5166B5 is a mid, vivid blue. Relative luminance 0.146; OKLCH L 53.2% C 0.126 H 270.4°. Best body text is #FFFFFF at 5.36:1 contrast (WCAG AA passes).

Color values

HEX	#5166B5
RGB	rgb(81, 102, 181)
HSL	hsl(227, 40%, 51%)
HSV	hsv(227, 55%, 71%)
CMYK	cmyk(55.2%, 43.6%, 0%, 29%)
CIE-LAB	lab(45.06, 15.62, -44.41)
CIE-LCH	lch(45.06, 47.08, 289.38°)
OKLab	oklab(53.21% 0.001 -0.1263)
OKLCH	oklch(53.21% 0.126 270.4)
XYZ	xyz(16.4825, 14.5871, 45.6541)
Luminance	0.1459 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166B5 #B5A051

analogous

#5198B5 #5166B5 #6E51B5

triadic

#5166B5 #B55166 #66B551

tetradic

#5166B5 #B55198 #B5A051 #51B56E

square

#5166B5 #B55198 #B5A051 #51B56E

split-complementary

#5166B5 #B56E51 #98B551

monochromatic

#2A3562 #3C4D8D #5166B5 #7C8CC7 #A7B2DA

Accessibility & contrast

On white

5.36

#5166B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.92

#5166B5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166B5

5.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166B5	#FFFFFF	#000000	##FFFFFF
##5166B5	1.00	5.36	3.92	5.36
#FFFFFF	5.36	1.00	21.00	1.00
#000000	3.92	21.00	1.00	21.00
##FFFFFF	5.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#446FB8

Deuteranopia (green-blind)

#3867B3

Tritanopia (blue-blind)

#1A7785

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #5166b5;
/* rgb */ color: rgb(81, 102, 181);
/* oklch */ color: oklch(53.2% 0.126 270.4);

Tailwind

colors: {
  custom: {
    50: '#8991cb',
    500: '#5166b5',
    950: '#000000',
  },
}

SCSS

$custom: #5166b5;
$custom-light: #8991cb;
$custom-dark: #000000;

JSON

{
  "hex": "#5166b5",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 181
  },
  "hsl": {
    "h": 227.4,
    "s": 40.323,
    "l": 51.373
  },
  "oklch": {
    "l": 0.53209,
    "c": 0.12626,
    "h": 270.4
  },
  "luminance": 0.14588
}

Semantic roles & 50–950 ramp

primary

#5166B5

secondary

#C7BE9B

accent

#B758D0

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0C13

muted

#7D7D82

Preview Lab

Preview with #5166B5

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

Preview Lab → · Contrast checker → · Palette generator →