#517DDB#517DDB

#517DDB is a mid, vivid blue. Relative luminance 0.215; OKLCH L 60.4% C 0.151 H 263.6°. Best body text is #000000 at 5.31:1 contrast (WCAG AA passes).

Color values

HEX	#517DDB
RGB	rgb(81, 125, 219)
HSL	hsl(221, 66%, 59%)
HSV	hsv(221, 63%, 86%)
CMYK	cmyk(63%, 42.9%, 0%, 14.1%)
CIE-LAB	lab(53.52, 14.19, -52.68)
CIE-LCH	lch(53.52, 54.56, 285.07°)
OKLab	oklab(60.41% -0.0168 -0.1503)
OKLCH	oklch(60.41% 0.151 263.6)
XYZ	xyz(23.5087, 21.5289, 69.9207)
Luminance	0.2153 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517DDB #DBAF51

analogous

#51C2DB #517DDB #6A51DB

triadic

#517DDB #DB517D #7DDB51

tetradic

#517DDB #DB51C2 #DBAF51 #51DB6A

square

#517DDB #DB51C2 #DBAF51 #51DB6A

split-complementary

#517DDB #DB6A51 #C2DB51

monochromatic

#1E4493 #295BC6 #517DDB #84A3E5 #B6C9F0

Accessibility & contrast

On white

3.96

#517DDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.31

#517DDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517DDB

5.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517DDB	#FFFFFF	#000000	##000000
##517DDB	1.00	3.96	5.31	5.31
#FFFFFF	3.96	1.00	21.00	21.00
#000000	5.31	21.00	1.00	1.00
##000000	5.31	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5187DF

Deuteranopia (green-blind)

#3C7AD9

Tritanopia (blue-blind)

#0092A1

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #517ddb;
/* rgb */ color: rgb(81, 125, 219);
/* oklch */ color: oklch(60.4% 0.151 263.6);

Tailwind

colors: {
  custom: {
    50: '#8ea2e7',
    500: '#517ddb',
    950: '#000000',
  },
}

SCSS

$custom: #517ddb;
$custom-light: #8ea2e7;
$custom-dark: #000000;

JSON

{
  "hex": "#517ddb",
  "rgb": {
    "r": 81,
    "g": 125,
    "b": 219
  },
  "hsl": {
    "h": 220.87,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.60407,
    "c": 0.1512,
    "h": 263.6
  },
  "luminance": 0.21531
}

Semantic roles & 50–950 ramp

primary

#517DDB

secondary

#DFCEA9

accent

#B33FE9

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0D0F16

muted

#7E7E84

Preview Lab

Preview with #517DDB

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

Preview Lab → · Contrast checker → · Palette generator →