#517FCF#517FCF

#517FCF is a mid, vivid blue. Relative luminance 0.214; OKLCH L 60.1% C 0.133 H 260.8°. Best body text is #000000 at 5.29:1 contrast (WCAG AA passes).

Color values

HEX	#517FCF
RGB	rgb(81, 127, 207)
HSL	hsl(218, 57%, 56%)
HSV	hsv(218, 61%, 81%)
CMYK	cmyk(60.9%, 38.6%, 0%, 18.8%)
CIE-LAB	lab(53.42, 8.90, -46.07)
CIE-LCH	lch(53.42, 46.92, 280.93°)
OKLab	oklab(60.11% -0.0213 -0.1308)
OKLCH	oklch(60.11% 0.133 260.8)
XYZ	xyz(22.2413, 21.4311, 61.9839)
Luminance	0.2143 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517FCF #CFA151

analogous

#51BECF #517FCF #6251CF

triadic

#517FCF #CF517F #7FCF51

tetradic

#517FCF #CF51BE #CFA151 #51CF62

square

#517FCF #CF51BE #CFA151 #51CF62

split-complementary

#517FCF #CF6251 #BECF51

monochromatic

#244682 #3160B2 #517FCF #81A2DC #B1C6E9

Accessibility & contrast

On white

3.97

#517FCF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.29

#517FCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517FCF

5.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517FCF	#FFFFFF	#000000	##000000
##517FCF	1.00	3.97	5.29	5.29
#FFFFFF	3.97	1.00	21.00	21.00
#000000	5.29	21.00	1.00	1.00
##000000	5.29	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C86D2

Deuteranopia (green-blind)

#4B7ACD

Tritanopia (blue-blind)

#00919D

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #517fcf;
/* rgb */ color: rgb(81, 127, 207);
/* oklch */ color: oklch(60.1% 0.133 260.8);

Tailwind

colors: {
  custom: {
    50: '#8ca3de',
    500: '#517fcf',
    950: '#000000',
  },
}

SCSS

$custom: #517fcf;
$custom-light: #8ca3de;
$custom-dark: #000000;

JSON

{
  "hex": "#517fcf",
  "rgb": {
    "r": 81,
    "g": 127,
    "b": 207
  },
  "hsl": {
    "h": 218.095,
    "s": 56.757,
    "l": 56.471
  },
  "oklch": {
    "l": 0.60113,
    "c": 0.13257,
    "h": 260.8
  },
  "luminance": 0.21433
}

Semantic roles & 50–950 ramp

primary

#517FCF

secondary

#D8C5A4

accent

#A848E0

background

#F9FAFD

surface

#F1F3FB

border

#CBCDD4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #517FCF

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

Preview Lab → · Contrast checker → · Palette generator →