#5166BF#5166BF

#5166BF is a mid, vivid blue. Relative luminance 0.150; OKLCH L 53.8% C 0.141 H 271.0°. Best body text is #FFFFFF at 5.25:1 contrast (WCAG AA passes).

Color values

HEX	#5166BF
RGB	rgb(81, 102, 191)
HSL	hsl(229, 46%, 53%)
HSV	hsv(229, 58%, 75%)
CMYK	cmyk(57.6%, 46.6%, 0%, 25.1%)
CIE-LAB	lab(45.65, 18.96, -49.28)
CIE-LCH	lch(45.65, 52.80, 291.04°)
OKLab	oklab(53.85% 0.0025 -0.1406)
OKLCH	oklch(53.85% 0.141 271)
XYZ	xyz(17.5456, 15.0123, 51.2532)
Luminance	0.1501 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166BF #BFAA51

analogous

#519DBF #5166BF #7351BF

triadic

#5166BF #BF5166 #66BF51

tetradic

#5166BF #BF519D #BFAA51 #51BF73

square

#5166BF #BF519D #BFAA51 #51BF73

split-complementary

#5166BF #BF7351 #9DBF51

monochromatic

#28356D #394B9A #5166BF #7E8DCF #AAB5E0

Accessibility & contrast

On white

5.25

#5166BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.00

#5166BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166BF

5.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166BF	#FFFFFF	#000000	##FFFFFF
##5166BF	1.00	5.25	4.00	5.25
#FFFFFF	5.25	1.00	21.00	1.00
#000000	4.00	21.00	1.00	21.00
##FFFFFF	5.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C71C2

Deuteranopia (green-blind)

#2D68BD

Tritanopia (blue-blind)

#007A89

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #5166bf;
/* rgb */ color: rgb(81, 102, 191);
/* oklch */ color: oklch(53.8% 0.141 271.0);

Tailwind

colors: {
  custom: {
    50: '#8b91d3',
    500: '#5166bf',
    950: '#000000',
  },
}

SCSS

$custom: #5166bf;
$custom-light: #8b91d3;
$custom-dark: #000000;

JSON

{
  "hex": "#5166bf",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 191
  },
  "hsl": {
    "h": 228.545,
    "s": 46.218,
    "l": 53.333
  },
  "oklch": {
    "l": 0.53848,
    "c": 0.14058,
    "h": 271
  },
  "luminance": 0.15014
}

Semantic roles & 50–950 ramp

primary

#5166BF

secondary

#CEC59E

accent

#BD52D6

background

#F8F8FD

surface

#F0F0FA

border

#CBCBD3

text

#0D0C14

muted

#7D7D83

Preview Lab

Preview with #5166BF

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

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