#5166E5#5166E5

#5166E5 is a mid, vivid blue. Relative luminance 0.169; OKLCH L 56.5% C 0.193 H 271.7°. Best body text is #FFFFFF at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#5166E5
RGB	rgb(81, 102, 229)
HSL	hsl(231, 74%, 61%)
HSV	hsv(231, 65%, 90%)
CMYK	cmyk(64.6%, 55.5%, 0%, 10.2%)
CIE-LAB	lab(48.14, 31.83, -66.98)
CIE-LCH	lch(48.14, 74.15, 295.42°)
OKLab	oklab(56.52% 0.0058 -0.1926)
OKLCH	oklch(56.52% 0.193 271.7)
XYZ	xyz(22.2828, 16.9072, 76.2027)
Luminance	0.1691 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166E5 #E5D051

analogous

#51B0E5 #5166E5 #8651E5

triadic

#5166E5 #E55166 #66E551

tetradic

#5166E5 #E551B0 #E5D051 #51E586

square

#5166E5 #E551B0 #E5D051 #51E586

split-complementary

#5166E5 #E58651 #B0E551

monochromatic

#182CA3 #203AD8 #5166E5 #8695ED #BBC4F5

Accessibility & contrast

On white

4.79

#5166E5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.38

#5166E5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166E5

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166E5	#FFFFFF	#000000	##FFFFFF
##5166E5	1.00	4.79	4.38	4.79
#FFFFFF	4.79	1.00	21.00	1.00
#000000	4.38	21.00	1.00	21.00
##FFFFFF	4.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0079E9

Deuteranopia (green-blind)

#006CE2

Tritanopia (blue-blind)

#00859C

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #5166e5;
/* rgb */ color: rgb(81, 102, 229);
/* oklch */ color: oklch(56.5% 0.193 271.7);

Tailwind

colors: {
  custom: {
    50: '#9191ee',
    500: '#5166e5',
    950: '#000000',
  },
}

SCSS

$custom: #5166e5;
$custom-light: #9191ee;
$custom-dark: #000000;

JSON

{
  "hex": "#5166e5",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 229
  },
  "hsl": {
    "h": 231.486,
    "s": 74,
    "l": 60.784
  },
  "oklch": {
    "l": 0.56524,
    "c": 0.1927,
    "h": 271.7
  },
  "luminance": 0.16909
}

Semantic roles & 50–950 ramp

primary

#5166E5

secondary

#E5DDAD

accent

#BA0FD6

background

#F9F8FE

surface

#F2F0FD

border

#CCCBD5

text

#0E0C16

muted

#7E7D84

Preview Lab

Preview with #5166E5

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

Preview Lab → · Contrast checker → · Palette generator →