#517BDB#517BDB

#517BDB is a mid, vivid blue. Relative luminance 0.210; OKLCH L 60.0% C 0.154 H 264.5°. Best body text is #000000 at 5.21:1 contrast (WCAG AA passes).

Color values

HEX	#517BDB
RGB	rgb(81, 123, 219)
HSL	hsl(222, 66%, 59%)
HSV	hsv(222, 63%, 86%)
CMYK	cmyk(63%, 43.8%, 0%, 14.1%)
CIE-LAB	lab(52.98, 15.41, -53.55)
CIE-LCH	lch(52.98, 55.72, 286.06°)
OKLab	oklab(59.99% -0.0148 -0.1528)
OKLCH	oklch(59.99% 0.154 264.5)
XYZ	xyz(23.2580, 21.0276, 69.8372)
Luminance	0.2103 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517BDB #DBB151

analogous

#51C0DB #517BDB #6C51DB

triadic

#517BDB #DB517B #7BDB51

tetradic

#517BDB #DB51C0 #DBB151 #51DB6C

square

#517BDB #DB51C0 #DBB151 #51DB6C

split-complementary

#517BDB #DB6C51 #C0DB51

monochromatic

#1E4293 #2959C6 #517BDB #84A1E5 #B6C8F0

Accessibility & contrast

On white

4.03

#517BDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.21

#517BDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517BDB

5.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517BDB	#FFFFFF	#000000	##000000
##517BDB	1.00	4.03	5.21	5.21
#FFFFFF	4.03	1.00	21.00	21.00
#000000	5.21	21.00	1.00	1.00
##000000	5.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E85DF

Deuteranopia (green-blind)

#3879D9

Tritanopia (blue-blind)

#0091A0

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #517bdb;
/* rgb */ color: rgb(81, 123, 219);
/* oklch */ color: oklch(60.0% 0.154 264.5);

Tailwind

colors: {
  custom: {
    50: '#8ea0e7',
    500: '#517bdb',
    950: '#000000',
  },
}

SCSS

$custom: #517bdb;
$custom-light: #8ea0e7;
$custom-dark: #000000;

JSON

{
  "hex": "#517bdb",
  "rgb": {
    "r": 81,
    "g": 123,
    "b": 219
  },
  "hsl": {
    "h": 221.739,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.59989,
    "c": 0.15356,
    "h": 264.5
  },
  "luminance": 0.2103
}

Semantic roles & 50–950 ramp

primary

#517BDB

secondary

#DFCFA9

accent

#B53FE9

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #517BDB

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

Preview Lab → · Contrast checker → · Palette generator →