#517CDB#517CDB

#517CDB is a mid, vivid blue. Relative luminance 0.213; OKLCH L 60.2% C 0.152 H 264.0°. Best body text is #000000 at 5.26:1 contrast (WCAG AA passes).

Color values

HEX	#517CDB
RGB	rgb(81, 124, 219)
HSL	hsl(221, 66%, 59%)
HSV	hsv(221, 63%, 86%)
CMYK	cmyk(63%, 43.4%, 0%, 14.1%)
CIE-LAB	lab(53.25, 14.80, -53.12)
CIE-LCH	lch(53.25, 55.14, 285.57°)
OKLab	oklab(60.2% -0.0158 -0.1515)
OKLCH	oklch(60.2% 0.152 264)
XYZ	xyz(23.3827, 21.2770, 69.8787)
Luminance	0.2128 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517CDB #DBB051

analogous

#51C1DB #517CDB #6B51DB

triadic

#517CDB #DB517C #7CDB51

tetradic

#517CDB #DB51C1 #DBB051 #51DB6B

square

#517CDB #DB51C1 #DBB051 #51DB6B

split-complementary

#517CDB #DB6B51 #C1DB51

monochromatic

#1E4393 #295AC6 #517CDB #84A2E5 #B6C8F0

Accessibility & contrast

On white

4.00

#517CDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.26

#517CDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517CDB

5.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517CDB	#FFFFFF	#000000	##000000
##517CDB	1.00	4.00	5.26	5.26
#FFFFFF	4.00	1.00	21.00	21.00
#000000	5.26	21.00	1.00	1.00
##000000	5.26	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5086DF

Deuteranopia (green-blind)

#3A79D9

Tritanopia (blue-blind)

#0092A1

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #517cdb;
/* rgb */ color: rgb(81, 124, 219);
/* oklch */ color: oklch(60.2% 0.152 264.0);

Tailwind

colors: {
  custom: {
    50: '#8ea1e7',
    500: '#517cdb',
    950: '#000000',
  },
}

SCSS

$custom: #517cdb;
$custom-light: #8ea1e7;
$custom-dark: #000000;

JSON

{
  "hex": "#517cdb",
  "rgb": {
    "r": 81,
    "g": 124,
    "b": 219
  },
  "hsl": {
    "h": 221.304,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.60198,
    "c": 0.15237,
    "h": 264
  },
  "luminance": 0.21279
}

Semantic roles & 50–950 ramp

primary

#517CDB

secondary

#DFCEA9

accent

#B43FE9

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #517CDB

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

Preview Lab → · Contrast checker → · Palette generator →