#5166FF#5166FF

#5166FF is a mid, highly saturated blue. Relative luminance 0.185; OKLCH L 58.6% C 0.226 H 271.5°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#5166FF
RGB	rgb(81, 102, 255)
HSL	hsl(233, 100%, 66%)
HSV	hsv(233, 68%, 100%)
CMYK	cmyk(68.2%, 60%, 0%, 0%)
CIE-LAB	lab(50.06, 40.61, -78.39)
CIE-LCH	lch(50.06, 88.29, 297.39°)
OKLab	oklab(58.55% 0.0059 -0.2262)
OKLCH	oklch(58.55% 0.226 271.5)
XYZ	xyz(26.1886, 18.4695, 96.7732)
Luminance	0.1847 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166FF #FFEA51

analogous

#51BDFF #5166FF #9351FF

triadic

#5166FF #FF5166 #66FF51

tetradic

#5166FF #FF51BD #FFEA51 #51FF93

square

#5166FF #FF51BD #FFEA51 #51FF93

split-complementary

#5166FF #FF9351 #BDFF51

monochromatic

#001AD6 #1430FF #5166FF #8E9CFF #CBD2FF

Accessibility & contrast

On white

4.47

#5166FF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#5166FF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5166FF

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166FF	#FFFFFF	#000000	##000000
##5166FF	1.00	4.47	4.69	4.69
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#007FFF

Deuteranopia (green-blind)

#006FFC

Tritanopia (blue-blind)

#008DA9

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #5166ff;
/* rgb */ color: rgb(81, 102, 255);
/* oklch */ color: oklch(58.6% 0.226 271.5);

Tailwind

colors: {
  custom: {
    50: '#9691ff',
    500: '#5166ff',
    950: '#000000',
  },
}

SCSS

$custom: #5166ff;
$custom-light: #9691ff;
$custom-dark: #000000;

JSON

{
  "hex": "#5166ff",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 255
  },
  "hsl": {
    "h": 232.759,
    "s": 100,
    "l": 65.882
  },
  "oklch": {
    "l": 0.58551,
    "c": 0.22624,
    "h": 271.5
  },
  "luminance": 0.18472
}

Semantic roles & 50–950 ramp

primary

#5166FF

secondary

#F3ECB9

accent

#CA00E6

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#0F0C18

muted

#7F7D86

Preview Lab

Preview with #5166FF

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

Preview Lab → · Contrast checker → · Palette generator →