#517FD9#517FD9

#517FD9 is a mid, vivid blue. Relative luminance 0.219; OKLCH L 60.7% C 0.146 H 262.5°. Best body text is #000000 at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#517FD9
RGB	rgb(81, 127, 217)
HSL	hsl(220, 64%, 58%)
HSV	hsv(220, 63%, 85%)
CMYK	cmyk(62.7%, 41.5%, 0%, 14.9%)
CIE-LAB	lab(53.96, 12.29, -50.86)
CIE-LCH	lch(53.96, 52.32, 283.58°)
OKLab	oklab(60.71% -0.0192 -0.1449)
OKLCH	oklch(60.71% 0.146 262.5)
XYZ	xyz(23.5027, 21.9357, 68.6276)
Luminance	0.2194 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517FD9 #D9AB51

analogous

#51C3D9 #517FD9 #6751D9

triadic

#517FD9 #D9517F #7FD951

tetradic

#517FD9 #D951C3 #D9AB51 #51D967

square

#517FD9 #D951C3 #D9AB51 #51D967

split-complementary

#517FD9 #D96751 #C3D951

monochromatic

#1F4690 #2A5EC2 #517FD9 #83A4E4 #B5C9EF

Accessibility & contrast

On white

3.90

#517FD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.39

#517FD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517FD9

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517FD9	#FFFFFF	#000000	##000000
##517FD9	1.00	3.90	5.39	5.39
#FFFFFF	3.90	1.00	21.00	21.00
#000000	5.39	21.00	1.00	1.00
##000000	5.39	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5688DD

Deuteranopia (green-blind)

#427BD7

Tritanopia (blue-blind)

#0093A1

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #517fd9;
/* rgb */ color: rgb(81, 127, 217);
/* oklch */ color: oklch(60.7% 0.146 262.5);

Tailwind

colors: {
  custom: {
    50: '#8ea3e5',
    500: '#517fd9',
    950: '#000000',
  },
}

SCSS

$custom: #517fd9;
$custom-light: #8ea3e5;
$custom-dark: #000000;

JSON

{
  "hex": "#517fd9",
  "rgb": {
    "r": 81,
    "g": 127,
    "b": 217
  },
  "hsl": {
    "h": 219.706,
    "s": 64.151,
    "l": 58.431
  },
  "oklch": {
    "l": 0.60707,
    "c": 0.14615,
    "h": 262.5
  },
  "luminance": 0.21938
}

Semantic roles & 50–950 ramp

primary

#517FD9

secondary

#DECCA8

accent

#AF41E7

background

#F9FAFE

surface

#F2F3FC

border

#CCCDD5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #517FD9

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

Preview Lab → · Contrast checker → · Palette generator →