#517EF0#517EF0

#517EF0 is a mid, vivid blue. Relative luminance 0.230; OKLCH L 62.0% C 0.178 H 265.3°. Best body text is #000000 at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#517EF0
RGB	rgb(81, 126, 240)
HSL	hsl(223, 84%, 63%)
HSV	hsv(223, 66%, 94%)
CMYK	cmyk(66.3%, 47.5%, 0%, 5.9%)
CIE-LAB	lab(55.03, 20.79, -62.01)
CIE-LCH	lch(55.03, 65.41, 288.53°)
OKLab	oklab(61.96% -0.0145 -0.1777)
OKLCH	oklch(61.96% 0.178 265.3)
XYZ	xyz(26.5769, 22.9597, 85.4522)
Luminance	0.2296 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517EF0 #F0C351

analogous

#51CDF0 #517EF0 #7351F0

triadic

#517EF0 #F0517E #7EF051

tetradic

#517EF0 #F051CD #F0C351 #51F073

square

#517EF0 #F051CD #F0C351 #51F073

split-complementary

#517EF0 #F07351 #CDF051

monochromatic

#103FB7 #1954EB #517EF0 #89A8F5 #C2D2FA

Accessibility & contrast

On white

3.76

#517EF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.59

#517EF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517EF0

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517EF0	#FFFFFF	#000000	##000000
##517EF0	1.00	3.76	5.59	5.59
#FFFFFF	3.76	1.00	21.00	21.00
#000000	5.59	21.00	1.00	1.00
##000000	5.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#418BF4

Deuteranopia (green-blind)

#1B7DEE

Tritanopia (blue-blind)

#0099AB

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #517ef0;
/* rgb */ color: rgb(81, 126, 240);
/* oklch */ color: oklch(62.0% 0.178 265.3);

Tailwind

colors: {
  custom: {
    50: '#92a2f6',
    500: '#517ef0',
    950: '#000000',
  },
}

SCSS

$custom: #517ef0;
$custom-light: #92a2f6;
$custom-dark: #000000;

JSON

{
  "hex": "#517ef0",
  "rgb": {
    "r": 81,
    "g": 126,
    "b": 240
  },
  "hsl": {
    "h": 223.019,
    "s": 84.127,
    "l": 62.941
  },
  "oklch": {
    "l": 0.61963,
    "c": 0.17827,
    "h": 265.3
  },
  "luminance": 0.22962
}

Semantic roles & 50–950 ramp

primary

#517EF0

secondary

#EBDBB2

accent

#A205E1

background

#F9F9FF

surface

#F2F2FE

border

#CCCCD6

text

#0E0F17

muted

#7E7E85

Preview Lab

Preview with #517EF0

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

Preview Lab → · Contrast checker → · Palette generator →