#517CCC#517CCC

#517CCC is a mid, vivid blue. Relative luminance 0.205; OKLCH L 59.3% C 0.132 H 261.8°. Best body text is #000000 at 5.10:1 contrast (WCAG AA passes).

Color values

HEX	#517CCC
RGB	rgb(81, 124, 204)
HSL	hsl(219, 55%, 56%)
HSV	hsv(219, 60%, 80%)
CMYK	cmyk(60.3%, 39.2%, 0%, 20%)
CIE-LAB	lab(52.42, 9.71, -45.95)
CIE-LCH	lch(52.42, 46.96, 281.93°)
OKLab	oklab(59.29% -0.0187 -0.1305)
OKLCH	oklch(59.29% 0.132 261.8)
XYZ	xyz(21.4963, 20.5224, 59.9434)
Luminance	0.2052 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517CCC #CCA151

analogous

#51BACC #517CCC #6351CC

triadic

#517CCC #CC517C #7CCC51

tetradic

#517CCC #CC51BA #CCA151 #51CC63

square

#517CCC #CC51BA #CCA151 #51CC63

split-complementary

#517CCC #CC6351 #BACC51

monochromatic

#25447E #335DAD #517CCC #80A0DA #B0C3E8

Accessibility & contrast

On white

4.11

#517CCC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.10

#517CCC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517CCC

5.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517CCC	#FFFFFF	#000000	##000000
##517CCC	1.00	4.11	5.10	5.10
#FFFFFF	4.11	1.00	21.00	21.00
#000000	5.10	21.00	1.00	1.00
##000000	5.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5983CF

Deuteranopia (green-blind)

#4978CA

Tritanopia (blue-blind)

#008E9A

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #517ccc;
/* rgb */ color: rgb(81, 124, 204);
/* oklch */ color: oklch(59.3% 0.132 261.8);

Tailwind

colors: {
  custom: {
    50: '#8ca1dc',
    500: '#517ccc',
    950: '#000000',
  },
}

SCSS

$custom: #517ccc;
$custom-light: #8ca1dc;
$custom-dark: #000000;

JSON

{
  "hex": "#517ccc",
  "rgb": {
    "r": 81,
    "g": 124,
    "b": 204
  },
  "hsl": {
    "h": 219.024,
    "s": 54.667,
    "l": 55.882
  },
  "oklch": {
    "l": 0.5929,
    "c": 0.13186,
    "h": 261.8
  },
  "luminance": 0.20524
}

Semantic roles & 50–950 ramp

primary

#517CCC

secondary

#D6C4A3

accent

#AA4ADE

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #517CCC

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

Preview Lab → · Contrast checker → · Palette generator →