#517FC9#517FC9

#517FC9 is a mid, vivid blue. Relative luminance 0.211; OKLCH L 59.8% C 0.124 H 259.5°. Best body text is #000000 at 5.23:1 contrast (WCAG AA passes).

Color values

HEX	#517FC9
RGB	rgb(81, 127, 201)
HSL	hsl(217, 53%, 55%)
HSV	hsv(217, 60%, 79%)
CMYK	cmyk(59.7%, 36.8%, 0%, 21.2%)
CIE-LAB	lab(53.11, 6.88, -43.16)
CIE-LCH	lch(53.11, 43.70, 279.06°)
OKLab	oklab(59.77% -0.0226 -0.1223)
OKLCH	oklch(59.77% 0.124 259.5)
XYZ	xyz(21.5216, 21.1432, 58.1939)
Luminance	0.2114 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517FC9 #C99B51

analogous

#51BBC9 #517FC9 #5F51C9

triadic

#517FC9 #C9517F #7FC951

tetradic

#517FC9 #C951BB #C99B51 #51C95F

square

#517FC9 #C951BB #C99B51 #51C95F

split-complementary

#517FC9 #C95F51 #BBC951

monochromatic

#26467A #3461A9 #517FC9 #80A1D7 #AEC4E6

Accessibility & contrast

On white

4.02

#517FC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.23

#517FC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517FC9

5.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517FC9	#FFFFFF	#000000	##000000
##517FC9	1.00	4.02	5.23	5.23
#FFFFFF	4.02	1.00	21.00	21.00
#000000	5.23	21.00	1.00	1.00
##000000	5.23	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6085CC

Deuteranopia (green-blind)

#507AC7

Tritanopia (blue-blind)

#00909A

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #517fc9;
/* rgb */ color: rgb(81, 127, 201);
/* oklch */ color: oklch(59.8% 0.124 259.5);

Tailwind

colors: {
  custom: {
    50: '#8ba3da',
    500: '#517fc9',
    950: '#000000',
  },
}

SCSS

$custom: #517fc9;
$custom-light: #8ba3da;
$custom-dark: #000000;

JSON

{
  "hex": "#517fc9",
  "rgb": {
    "r": 81,
    "g": 127,
    "b": 201
  },
  "hsl": {
    "h": 217,
    "s": 52.632,
    "l": 55.294
  },
  "oklch": {
    "l": 0.59768,
    "c": 0.12442,
    "h": 259.5
  },
  "luminance": 0.21145
}

Semantic roles & 50–950 ramp

primary

#517FC9

secondary

#D4C1A2

accent

#A54CDC

background

#F9FAFD

surface

#F1F3FA

border

#CBCDD3

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #517FC9

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

Preview Lab → · Contrast checker → · Palette generator →