#5166BC#5166BC

#5166BC is a mid, vivid blue. Relative luminance 0.149; OKLCH L 53.7% C 0.136 H 270.9°. Best body text is #FFFFFF at 5.28:1 contrast (WCAG AA passes).

Color values

HEX	#5166BC
RGB	rgb(81, 102, 188)
HSL	hsl(228, 44%, 53%)
HSV	hsv(228, 57%, 74%)
CMYK	cmyk(56.9%, 45.7%, 0%, 26.3%)
CIE-LAB	lab(45.47, 17.95, -47.83)
CIE-LCH	lch(45.47, 51.09, 290.57°)
OKLab	oklab(53.65% 0.0021 -0.1363)
OKLCH	oklch(53.65% 0.136 270.9)
XYZ	xyz(17.2188, 14.8816, 49.5323)
Luminance	0.1488 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166BC #BCA751

analogous

#519CBC #5166BC #7151BC

triadic

#5166BC #BC5166 #66BC51

tetradic

#5166BC #BC519C #BCA751 #51BC71

square

#5166BC #BC519C #BCA751 #51BC71

split-complementary

#5166BC #BC7151 #9CBC51

monochromatic

#29366A #3A4C96 #5166BC #7D8DCD #A9B4DE

Accessibility & contrast

On white

5.28

#5166BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.98

#5166BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166BC

5.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166BC	#FFFFFF	#000000	##FFFFFF
##5166BC	1.00	5.28	3.98	5.28
#FFFFFF	5.28	1.00	21.00	1.00
#000000	3.98	21.00	1.00	21.00
##FFFFFF	5.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F71BF

Deuteranopia (green-blind)

#3067BA

Tritanopia (blue-blind)

#0B7988

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #5166bc;
/* rgb */ color: rgb(81, 102, 188);
/* oklch */ color: oklch(53.7% 0.136 270.9);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#5166bc",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 188
  },
  "hsl": {
    "h": 228.224,
    "s": 44.398,
    "l": 52.745
  },
  "oklch": {
    "l": 0.53653,
    "c": 0.13632,
    "h": 270.9
  },
  "luminance": 0.14883
}

Semantic roles & 50–950 ramp

primary

#5166BC

secondary

#CCC29D

accent

#BB54D4

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0C14

muted

#7D7D82

Preview Lab

Preview with #5166BC

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

Preview Lab → · Contrast checker → · Palette generator →