#5166DC#5166DC

#5166DC is a mid, vivid blue. Relative luminance 0.164; OKLCH L 55.9% C 0.181 H 271.7°. Best body text is #FFFFFF at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#5166DC
RGB	rgb(81, 102, 220)
HSL	hsl(231, 67%, 59%)
HSV	hsv(231, 63%, 86%)
CMYK	cmyk(63.2%, 53.6%, 0%, 13.7%)
CIE-LAB	lab(47.52, 28.77, -62.90)
CIE-LCH	lch(47.52, 69.17, 294.58°)
OKLab	oklab(55.86% 0.0053 -0.1806)
OKLCH	oklch(55.86% 0.181 271.7)
XYZ	xyz(21.0587, 16.4176, 69.7554)
Luminance	0.1642 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166DC #DCC751

analogous

#51ACDC #5166DC #8251DC

triadic

#5166DC #DC5166 #66DC51

tetradic

#5166DC #DC51AC #DCC751 #51DC82

square

#5166DC #DC51AC #DCC751 #51DC82

split-complementary

#5166DC #DC8251 #ACDC51

monochromatic

#1E3095 #2840C8 #5166DC #8493E6 #B7C0F0

Accessibility & contrast

On white

4.90

#5166DC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#5166DC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166DC

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166DC	#FFFFFF	#000000	##FFFFFF
##5166DC	1.00	4.90	4.28	4.90
#FFFFFF	4.90	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1177E0

Deuteranopia (green-blind)

#006BDA

Tritanopia (blue-blind)

#008297

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #5166dc;
/* rgb */ color: rgb(81, 102, 220);
/* oklch */ color: oklch(55.9% 0.181 271.7);

Tailwind

colors: {
  custom: {
    50: '#8f91e8',
    500: '#5166dc',
    950: '#000000',
  },
}

SCSS

$custom: #5166dc;
$custom-light: #8f91e8;
$custom-dark: #000000;

JSON

{
  "hex": "#5166dc",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 220
  },
  "hsl": {
    "h": 230.935,
    "s": 66.507,
    "l": 59.02
  },
  "oklch": {
    "l": 0.55857,
    "c": 0.18069,
    "h": 271.7
  },
  "luminance": 0.16419
}

Semantic roles & 50–950 ramp

primary

#5166DC

secondary

#E0D7A9

accent

#D03EE9

background

#F9F8FE

surface

#F2F0FD

border

#CCCBD5

text

#0E0C16

muted

#7E7D84

Preview Lab

Preview with #5166DC

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

Preview Lab → · Contrast checker → · Palette generator →