#5166E1#5166E1

#5166E1 is a mid, vivid blue. Relative luminance 0.167; OKLCH L 56.2% C 0.187 H 271.7°. Best body text is #FFFFFF at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#5166E1
RGB	rgb(81, 102, 225)
HSL	hsl(231, 71%, 60%)
HSV	hsv(231, 64%, 88%)
CMYK	cmyk(64%, 54.7%, 0%, 11.8%)
CIE-LAB	lab(47.86, 30.47, -65.17)
CIE-LCH	lch(47.86, 71.94, 295.06°)
OKLab	oklab(56.23% 0.0056 -0.1873)
OKLCH	oklch(56.23% 0.187 271.7)
XYZ	xyz(21.7308, 16.6864, 73.2952)
Luminance	0.1669 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166E1 #E1CC51

analogous

#51AEE1 #5166E1 #8451E1

triadic

#5166E1 #E15166 #66E151

tetradic

#5166E1 #E151AE #E1CC51 #51E184

square

#5166E1 #E151AE #E1CC51 #51E184

split-complementary

#5166E1 #E18451 #AEE151

monochromatic

#1B2E9D #243DD1 #5166E1 #8594EA #B9C2F3

Accessibility & contrast

On white

4.84

#5166E1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.34

#5166E1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166E1

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166E1	#FFFFFF	#000000	##FFFFFF
##5166E1	1.00	4.84	4.34	4.84
#FFFFFF	4.84	1.00	21.00	1.00
#000000	4.34	21.00	1.00	21.00
##FFFFFF	4.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0078E5

Deuteranopia (green-blind)

#006BDF

Tritanopia (blue-blind)

#00839A

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #5166e1;
/* rgb */ color: rgb(81, 102, 225);
/* oklch */ color: oklch(56.2% 0.187 271.7);

Tailwind

colors: {
  custom: {
    50: '#9091eb',
    500: '#5166e1',
    950: '#000000',
  },
}

SCSS

$custom: #5166e1;
$custom-light: #9091eb;
$custom-dark: #000000;

JSON

{
  "hex": "#5166e1",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 225
  },
  "hsl": {
    "h": 231.25,
    "s": 70.588,
    "l": 60
  },
  "oklch": {
    "l": 0.56225,
    "c": 0.18738,
    "h": 271.7
  },
  "luminance": 0.16688
}

Semantic roles & 50–950 ramp

primary

#5166E1

secondary

#E3DBAB

accent

#D33AED

background

#F9F8FE

surface

#F2F0FD

border

#CCCBD5

text

#0E0C16

muted

#7E7D84

Preview Lab

Preview with #5166E1

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

Preview Lab → · Contrast checker → · Palette generator →