#516DDB#516DDB

#516DDB is a mid, vivid blue. Relative luminance 0.178; OKLCH L 57.1% C 0.171 H 269.6°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#516DDB
RGB	rgb(81, 109, 219)
HSL	hsl(228, 66%, 59%)
HSV	hsv(228, 63%, 86%)
CMYK	cmyk(63%, 50.2%, 0%, 14.1%)
CIE-LAB	lab(49.25, 24.07, -59.53)
CIE-LCH	lch(49.25, 64.22, 292.02°)
OKLab	oklab(57.14% -0.0012 -0.1706)
OKLCH	oklch(57.14% 0.171 269.6)
XYZ	xyz(21.6438, 17.7992, 69.2991)
Luminance	0.1780 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#516DDB #DBBF51

analogous

#51B2DB #516DDB #7A51DB

triadic

#516DDB #DB516D #6DDB51

tetradic

#516DDB #DB51B2 #DBBF51 #51DB7A

square

#516DDB #DB51B2 #DBBF51 #51DB7A

split-complementary

#516DDB #DB7A51 #B2DB51

monochromatic

#1E3693 #2949C6 #516DDB #8498E5 #B6C2F0

Accessibility & contrast

On white

4.61

#516DDB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#516DDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #516DDB

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##516DDB	#FFFFFF	#000000	##FFFFFF
##516DDB	1.00	4.61	4.56	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F7CDF

Deuteranopia (green-blind)

#016FD9

Tritanopia (blue-blind)

#00879A

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #516ddb;
/* rgb */ color: rgb(81, 109, 219);
/* oklch */ color: oklch(57.1% 0.171 269.6);

Tailwind

colors: {
  custom: {
    50: '#8f96e7',
    500: '#516ddb',
    950: '#000000',
  },
}

SCSS

$custom: #516ddb;
$custom-light: #8f96e7;
$custom-dark: #000000;

JSON

{
  "hex": "#516ddb",
  "rgb": {
    "r": 81,
    "g": 109,
    "b": 219
  },
  "hsl": {
    "h": 227.826,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.57144,
    "c": 0.17062,
    "h": 269.6
  },
  "luminance": 0.17801
}

Semantic roles & 50–950 ramp

primary

#516DDB

secondary

#DFD4A9

accent

#C63FE9

background

#F9F9FE

surface

#F2F1FC

border

#CCCBD5

text

#0E0D16

muted

#7E7E84

Preview Lab

Preview with #516DDB

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

Preview Lab → · Contrast checker → · Palette generator →