#517DEE#517DEE

#517DEE is a mid, vivid blue. Relative luminance 0.226; OKLCH L 61.6% C 0.177 H 265.5°. Best body text is #000000 at 5.52:1 contrast (WCAG AA passes).

Color values

HEX	#517DEE
RGB	rgb(81, 125, 238)
HSL	hsl(223, 82%, 63%)
HSV	hsv(223, 66%, 93%)
CMYK	cmyk(66%, 47.5%, 0%, 6.7%)
CIE-LAB	lab(54.64, 20.71, -61.52)
CIE-LCH	lch(54.64, 64.92, 288.61°)
OKLab	oklab(61.63% -0.0138 -0.1762)
OKLCH	oklch(61.63% 0.177 265.5)
XYZ	xyz(26.1542, 22.5871, 83.8538)
Luminance	0.2259 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517DEE #EEC251

analogous

#51CBEE #517DEE #7451EE

triadic

#517DEE #EE517D #7DEE51

tetradic

#517DEE #EE51CB #EEC251 #51EE74

square

#517DEE #EE51CB #EEC251 #51EE74

split-complementary

#517DEE #EE7451 #CBEE51

monochromatic

#113FB3 #1953E9 #517DEE #89A7F3 #C1D0F9

Accessibility & contrast

On white

3.81

#517DEE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.52

#517DEE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517DEE

5.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517DEE	#FFFFFF	#000000	##000000
##517DEE	1.00	3.81	5.52	5.52
#FFFFFF	3.81	1.00	21.00	21.00
#000000	5.52	21.00	1.00	1.00
##000000	5.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#418AF2

Deuteranopia (green-blind)

#1C7CEC

Tritanopia (blue-blind)

#0097AA

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #517dee;
/* rgb */ color: rgb(81, 125, 238);
/* oklch */ color: oklch(61.6% 0.177 265.5);

Tailwind

colors: {
  custom: {
    50: '#91a2f4',
    500: '#517dee',
    950: '#000000',
  },
}

SCSS

$custom: #517dee;
$custom-light: #91a2f4;
$custom-dark: #000000;

JSON

{
  "hex": "#517dee",
  "rgb": {
    "r": 81,
    "g": 125,
    "b": 238
  },
  "hsl": {
    "h": 223.185,
    "s": 82.199,
    "l": 62.549
  },
  "oklch": {
    "l": 0.61628,
    "c": 0.17679,
    "h": 265.5
  },
  "luminance": 0.2259
}

Semantic roles & 50–950 ramp

primary

#517DEE

secondary

#EADAB1

accent

#A207DF

background

#F9F9FF

surface

#F2F2FE

border

#CCCCD6

text

#0E0F17

muted

#7E7E85

Preview Lab

Preview with #517DEE

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

Preview Lab → · Contrast checker → · Palette generator →