#5166DD#5166DD

#5166DD is a mid, vivid blue. Relative luminance 0.165; OKLCH L 55.9% C 0.182 H 271.7°. Best body text is #FFFFFF at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#5166DD
RGB	rgb(81, 102, 221)
HSL	hsl(231, 67%, 59%)
HSV	hsv(231, 63%, 87%)
CMYK	cmyk(63.3%, 53.8%, 0%, 13.3%)
CIE-LAB	lab(47.59, 29.11, -63.36)
CIE-LCH	lch(47.59, 69.72, 294.68°)
OKLab	oklab(55.93% 0.0054 -0.182)
OKLCH	oklch(55.93% 0.182 271.7)
XYZ	xyz(21.1915, 16.4707, 70.4550)
Luminance	0.1647 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166DD #DDC851

analogous

#51ACDD #5166DD #8251DD

triadic

#5166DD #DD5166 #66DD51

tetradic

#5166DD #DD51AC #DDC851 #51DD82

square

#5166DD #DD51AC #DDC851 #51DD82

split-complementary

#5166DD #DD8251 #ACDD51

monochromatic

#1D2F96 #2740C9 #5166DD #8493E7 #B7C0F1

Accessibility & contrast

On white

4.89

#5166DD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.29

#5166DD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166DD

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166DD	#FFFFFF	#000000	##FFFFFF
##5166DD	1.00	4.89	4.29	4.89
#FFFFFF	4.89	1.00	21.00	1.00
#000000	4.29	21.00	1.00	21.00
##FFFFFF	4.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E77E1

Deuteranopia (green-blind)

#006BDB

Tritanopia (blue-blind)

#008298

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #5166dd;
/* rgb */ color: rgb(81, 102, 221);
/* oklch */ color: oklch(55.9% 0.182 271.7);

Tailwind

colors: {
  custom: {
    50: '#9091e8',
    500: '#5166dd',
    950: '#000000',
  },
}

SCSS

$custom: #5166dd;
$custom-light: #9091e8;
$custom-dark: #000000;

JSON

{
  "hex": "#5166dd",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 221
  },
  "hsl": {
    "h": 231,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.5593,
    "c": 0.18204,
    "h": 271.7
  },
  "luminance": 0.16473
}

Semantic roles & 50–950 ramp

primary

#5166DD

secondary

#E0D8AA

accent

#D03EEA

background

#F9F8FE

surface

#F2F0FD

border

#CCCBD5

text

#0E0C16

muted

#7E7D84

Preview Lab

Preview with #5166DD

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

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