#5166BA#5166BA

#5166BA is a mid, vivid blue. Relative luminance 0.148; OKLCH L 53.5% C 0.133 H 270.8°. Best body text is #FFFFFF at 5.30:1 contrast (WCAG AA passes).

Color values

HEX	#5166BA
RGB	rgb(81, 102, 186)
HSL	hsl(228, 43%, 52%)
HSV	hsv(228, 56%, 73%)
CMYK	cmyk(56.5%, 45.2%, 0%, 27.1%)
CIE-LAB	lab(45.35, 17.28, -46.86)
CIE-LCH	lch(45.35, 49.95, 290.25°)
OKLab	oklab(53.52% 0.0018 -0.1334)
OKLCH	oklch(53.52% 0.133 270.8)
XYZ	xyz(17.0047, 14.7960, 48.4047)
Luminance	0.1480 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166BA #BAA551

analogous

#519BBA #5166BA #7151BA

triadic

#5166BA #BA5166 #66BA51

tetradic

#5166BA #BA519B #BAA551 #51BA71

square

#5166BA #BA519B #BAA551 #51BA71

split-complementary

#5166BA #BA7151 #9BBA51

monochromatic

#293668 #3A4C93 #5166BA #7D8DCB #A9B3DD

Accessibility & contrast

On white

5.30

#5166BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.96

#5166BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166BA

5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166BA	#FFFFFF	#000000	##FFFFFF
##5166BA	1.00	5.30	3.96	5.30
#FFFFFF	5.30	1.00	21.00	1.00
#000000	3.96	21.00	1.00	21.00
##FFFFFF	5.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4070BD

Deuteranopia (green-blind)

#3367B8

Tritanopia (blue-blind)

#107987

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #5166ba;
/* rgb */ color: rgb(81, 102, 186);
/* oklch */ color: oklch(53.5% 0.133 270.8);

Tailwind

colors: {
  custom: {
    50: '#8a91cf',
    500: '#5166ba',
    950: '#000000',
  },
}

SCSS

$custom: #5166ba;
$custom-light: #8a91cf;
$custom-dark: #000000;

JSON

{
  "hex": "#5166ba",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 186
  },
  "hsl": {
    "h": 228,
    "s": 43.21,
    "l": 52.353
  },
  "oklch": {
    "l": 0.53524,
    "c": 0.13345,
    "h": 270.8
  },
  "luminance": 0.14797
}

Semantic roles & 50–950 ramp

primary

#5166BA

secondary

#CAC19D

accent

#BA55D3

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0C14

muted

#7D7D82

Preview Lab

Preview with #5166BA

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

Preview Lab → · Contrast checker → · Palette generator →