#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
RGB	rgb(81, 125, 218)
HSL	hsl(221, 65%, 59%)
HSV	hsv(221, 63%, 85%)
CMYK	cmyk(62.8%, 42.7%, 0%, 14.5%)
CIE-LAB	lab(53.47, 13.85, -52.21)
CIE-LCH	lch(53.47, 54.01, 284.85°)
OKLab	oklab(60.35% -0.017 -0.1489)
OKLCH	oklch(60.35% 0.15 263.5)
XYZ	xyz(23.3774, 21.4764, 69.2295)
Luminance	0.2148 (WCAG relative)
Temperature	cool
Family	blue

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
##517DDA	1.00	3.97	5.30	5.30
#FFFFFF	3.97	1.00	21.00	21.00
#000000	5.30	21.00	1.00	1.00
##000000	5.30	21.00	1.00	1.00

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 →