#517DE4#517DE4

#517DE4 is a mid, vivid blue. Relative luminance 0.220; OKLCH L 61.0% C 0.163 H 264.6°. Best body text is #000000 at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#517DE4
RGB	rgb(81, 125, 228)
HSL	hsl(222, 73%, 61%)
HSV	hsv(222, 64%, 89%)
CMYK	cmyk(64.5%, 45.2%, 0%, 10.6%)
CIE-LAB	lab(54.04, 17.27, -56.90)
CIE-LCH	lch(54.04, 59.47, 286.88°)
OKLab	oklab(60.98% -0.0153 -0.1627)
OKLCH	oklch(60.98% 0.163 264.6)
XYZ	xyz(24.7257, 22.0157, 76.3302)
Luminance	0.2202 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517DE4 #E4B851

analogous

#51C6E4 #517DE4 #6E51E4

triadic

#517DE4 #E4517D #7DE451

tetradic

#517DE4 #E451C6 #E4B851 #51E46E

square

#517DE4 #E451C6 #E4B851 #51E46E

split-complementary

#517DE4 #E46E51 #C6E451

monochromatic

#1942A2 #2158D7 #517DE4 #86A5EC #BBCCF4

Accessibility & contrast

On white

3.89

#517DE4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.40

#517DE4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517DE4

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517DE4	#FFFFFF	#000000	##000000
##517DE4	1.00	3.89	5.40	5.40
#FFFFFF	3.89	1.00	21.00	21.00
#000000	5.40	21.00	1.00	1.00
##000000	5.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B88E8

Deuteranopia (green-blind)

#307BE2

Tritanopia (blue-blind)

#0095A5

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #517de4;
/* rgb */ color: rgb(81, 125, 228);
/* oklch */ color: oklch(61.0% 0.163 264.6);

Tailwind

colors: {
  custom: {
    50: '#90a2ed',
    500: '#517de4',
    950: '#000000',
  },
}

SCSS

$custom: #517de4;
$custom-light: #90a2ed;
$custom-dark: #000000;

JSON

{
  "hex": "#517de4",
  "rgb": {
    "r": 81,
    "g": 125,
    "b": 228
  },
  "hsl": {
    "h": 222.041,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.60975,
    "c": 0.16339,
    "h": 264.6
  },
  "luminance": 0.22018
}

Semantic roles & 50–950 ramp

primary

#517DE4

secondary

#E4D4AC

accent

#9A10D5

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0F16

muted

#7E7E84

Preview Lab

Preview with #517DE4

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

Preview Lab → · Contrast checker → · Palette generator →