#5166DE#5166DE

#5166DE is a mid, vivid blue. Relative luminance 0.165; OKLCH L 56.0% C 0.183 H 271.7°. Best body text is #FFFFFF at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#5166DE
RGB	rgb(81, 102, 222)
HSL	hsl(231, 68%, 59%)
HSV	hsv(231, 64%, 87%)
CMYK	cmyk(63.5%, 54.1%, 0%, 12.9%)
CIE-LAB	lab(47.65, 29.45, -63.81)
CIE-LCH	lch(47.65, 70.28, 294.77°)
OKLab	oklab(56% 0.0055 -0.1833)
OKLCH	oklch(56% 0.183 271.7)
XYZ	xyz(21.3251, 16.5241, 71.1588)
Luminance	0.1653 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166DE #DEC951

analogous

#51ADDE #5166DE #8351DE

triadic

#5166DE #DE5166 #66DE51

tetradic

#5166DE #DE51AD #DEC951 #51DE83

square

#5166DE #DE51AD #DEC951 #51DE83

split-complementary

#5166DE #DE8351 #ADDE51

monochromatic

#1D2F98 #273FCB #5166DE #8493E8 #B8C0F2

Accessibility & contrast

On white

4.88

#5166DE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#5166DE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166DE

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166DE	#FFFFFF	#000000	##FFFFFF
##5166DE	1.00	4.88	4.31	4.88
#FFFFFF	4.88	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0978E2

Deuteranopia (green-blind)

#006BDC

Tritanopia (blue-blind)

#008298

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #5166de;
/* rgb */ color: rgb(81, 102, 222);
/* oklch */ color: oklch(56.0% 0.183 271.7);

Tailwind

colors: {
  custom: {
    50: '#9091e9',
    500: '#5166de',
    950: '#000000',
  },
}

SCSS

$custom: #5166de;
$custom-light: #9091e9;
$custom-dark: #000000;

JSON

{
  "hex": "#5166de",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 222
  },
  "hsl": {
    "h": 231.064,
    "s": 68.116,
    "l": 59.412
  },
  "oklch": {
    "l": 0.56003,
    "c": 0.18338,
    "h": 271.7
  },
  "luminance": 0.16526
}

Semantic roles & 50–950 ramp

primary

#5166DE

secondary

#E1D9AA

accent

#D13DEB

background

#F9F8FE

surface

#F2F0FD

border

#CCCBD5

text

#0E0C16

muted

#7E7D84

Preview Lab

Preview with #5166DE

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

Preview Lab → · Contrast checker → · Palette generator →