#517CD9#517CD9

#517CD9 is a mid, vivid blue. Relative luminance 0.212; OKLCH L 60.1% C 0.150 H 263.8°. Best body text is #000000 at 5.23:1 contrast (WCAG AA passes).

Color values

HEX	#517CD9
RGB	rgb(81, 124, 217)
HSL	hsl(221, 64%, 58%)
HSV	hsv(221, 63%, 85%)
CMYK	cmyk(62.7%, 42.9%, 0%, 14.9%)
CIE-LAB	lab(53.14, 14.12, -52.17)
CIE-LCH	lch(53.14, 54.05, 285.14°)
OKLab	oklab(60.07% -0.0162 -0.1488)
OKLCH	oklch(60.07% 0.15 263.8)
XYZ	xyz(23.1210, 21.1723, 68.5004)
Luminance	0.2117 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517CD9 #D9AE51

analogous

#51C0D9 #517CD9 #6A51D9

triadic

#517CD9 #D9517C #7CD951

tetradic

#517CD9 #D951C0 #D9AE51 #51D96A

square

#517CD9 #D951C0 #D9AE51 #51D96A

split-complementary

#517CD9 #D96A51 #C0D951

monochromatic

#1F4390 #2A5AC2 #517CD9 #83A2E4 #B5C8EF

Accessibility & contrast

On white

4.01

#517CD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.23

#517CD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517CD9

5.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517CD9	#FFFFFF	#000000	##000000
##517CD9	1.00	4.01	5.23	5.23
#FFFFFF	4.01	1.00	21.00	21.00
#000000	5.23	21.00	1.00	1.00
##000000	5.23	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5186DD

Deuteranopia (green-blind)

#3C79D7

Tritanopia (blue-blind)

#0091A0

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #517cd9;
/* rgb */ color: rgb(81, 124, 217);
/* oklch */ color: oklch(60.1% 0.150 263.8);

Tailwind

colors: {
  custom: {
    50: '#8ea1e5',
    500: '#517cd9',
    950: '#000000',
  },
}

SCSS

$custom: #517cd9;
$custom-light: #8ea1e5;
$custom-dark: #000000;

JSON

{
  "hex": "#517cd9",
  "rgb": {
    "r": 81,
    "g": 124,
    "b": 217
  },
  "hsl": {
    "h": 221.029,
    "s": 64.151,
    "l": 58.431
  },
  "oklch": {
    "l": 0.60074,
    "c": 0.14965,
    "h": 263.8
  },
  "luminance": 0.21174
}

Semantic roles & 50–950 ramp

primary

#517CD9

secondary

#DECDA8

accent

#B341E7

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #517CD9

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

Preview Lab → · Contrast checker → · Palette generator →