#517DDA#517DDA

#517DDA is a mid, vivid blue. Relative luminance 0.215; OKLCH L 60.3% C 0.150 H 263.5°. Best body text is #000000 at 5.30:1 contrast (WCAG AA passes).

Color values

HEX#517DDA
RGBrgb(81, 125, 218)
HSLhsl(221, 65%, 59%)
HSVhsv(221, 63%, 85%)
CMYKcmyk(62.8%, 42.7%, 0%, 14.5%)
CIE-LABlab(53.47, 13.85, -52.21)
CIE-LCHlch(53.47, 54.01, 284.85°)
OKLaboklab(60.35% -0.017 -0.1489)
OKLCHoklch(60.35% 0.15 263.5)
XYZxyz(23.3774, 21.4764, 69.2295)
Luminance0.2148 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#517DDA #DAAE51
analogous
#51C1DA #517DDA #6951DA
triadic
#517DDA #DA517D #7DDA51
tetradic
#517DDA #DA51C1 #DAAE51 #51DA69
square
#517DDA #DA51C1 #DAAE51 #51DA69
split-complementary
#517DDA #DA6951 #C1DA51
monochromatic
#1F4492 #2A5BC4 #517DDA #83A3E5 #B6C8EF

Accessibility & contrast

On white

3.97
#517DDA on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.30
#517DDA on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517DDA
5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##517DDA#FFFFFF#000000##000000
##517DDA1.003.975.305.30
#FFFFFF3.971.0021.0021.00
#0000005.3021.001.001.00
##0000005.3021.001.001.00

Color blindness preview

Protanopia (red-blind)
#5286DE
Deuteranopia (green-blind)
#3D7AD8
Tritanopia (blue-blind)
#0092A1
Achromatopsia (no color)
#808080

Design tokens & code

CSS
--color: #517dda;
/* rgb */ color: rgb(81, 125, 218);
/* oklch */ color: oklch(60.3% 0.150 263.5);
Tailwind
colors: {
  custom: {
    50: '#8ea2e6',
    500: '#517dda',
    950: '#000000',
  },
}
SCSS
$custom: #517dda;
$custom-light: #8ea2e6;
$custom-dark: #000000;
JSON
{
  "hex": "#517dda",
  "rgb": {
    "r": 81,
    "g": 125,
    "b": 218
  },
  "hsl": {
    "h": 220.73,
    "s": 64.929,
    "l": 58.627
  },
  "oklch": {
    "l": 0.60346,
    "c": 0.14984,
    "h": 263.5
  },
  "luminance": 0.21479
}

Semantic roles & 50–950 ramp

primary
#517DDA
secondary
#DECDA8
accent
#B240E8
background
#F9F9FE
surface
#F2F2FC
border
#CCCCD5
text
#0D0F16
muted
#7E7E84

Preview Lab

Preview with #517DDA

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

Preview Lab → · Contrast checker → · Palette generator →

#517DDA Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva