#517FCC#517FCC

#517FCC is a mid, vivid blue. Relative luminance 0.213; OKLCH L 59.9% C 0.128 H 260.2°. Best body text is #000000 at 5.26:1 contrast (WCAG AA passes).

Color values

HEX	#517FCC
RGB	rgb(81, 127, 204)
HSL	hsl(218, 55%, 56%)
HSV	hsv(218, 60%, 80%)
CMYK	cmyk(60.3%, 37.7%, 0%, 20%)
CIE-LAB	lab(53.26, 7.89, -44.62)
CIE-LCH	lch(53.26, 45.31, 280.03°)
OKLab	oklab(59.94% -0.0219 -0.1266)
OKLCH	oklch(59.94% 0.128 260.2)
XYZ	xyz(21.8780, 21.2858, 60.0707)
Luminance	0.2129 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517FCC #CC9E51

analogous

#51BCCC #517FCC #6051CC

triadic

#517FCC #CC517F #7FCC51

tetradic

#517FCC #CC51BC #CC9E51 #51CC60

square

#517FCC #CC51BC #CC9E51 #51CC60

split-complementary

#517FCC #CC6051 #BCCC51

monochromatic

#25467E #3360AD #517FCC #80A2DA #B0C5E8

Accessibility & contrast

On white

3.99

#517FCC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.26

#517FCC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517FCC

5.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517FCC	#FFFFFF	#000000	##000000
##517FCC	1.00	3.99	5.26	5.26
#FFFFFF	3.99	1.00	21.00	21.00
#000000	5.26	21.00	1.00	1.00
##000000	5.26	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E85CF

Deuteranopia (green-blind)

#4E7ACA

Tritanopia (blue-blind)

#00909C

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #517fcc;
/* rgb */ color: rgb(81, 127, 204);
/* oklch */ color: oklch(59.9% 0.128 260.2);

Tailwind

colors: {
  custom: {
    50: '#8ca3dc',
    500: '#517fcc',
    950: '#000000',
  },
}

SCSS

$custom: #517fcc;
$custom-light: #8ca3dc;
$custom-dark: #000000;

JSON

{
  "hex": "#517fcc",
  "rgb": {
    "r": 81,
    "g": 127,
    "b": 204
  },
  "hsl": {
    "h": 217.561,
    "s": 54.667,
    "l": 55.882
  },
  "oklch": {
    "l": 0.59939,
    "c": 0.12849,
    "h": 260.2
  },
  "luminance": 0.21288
}

Semantic roles & 50–950 ramp

primary

#517FCC

secondary

#D6C3A3

accent

#A74ADE

background

#F9FAFD

surface

#F1F3FB

border

#CBCDD4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #517FCC

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

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