#517BC9#517BC9

#517BC9 is a mid, vivid blue. Relative luminance 0.201; OKLCH L 58.9% C 0.129 H 261.8°. Best body text is #000000 at 5.03:1 contrast (WCAG AA passes).

Color values

HEX	#517BC9
RGB	rgb(81, 123, 201)
HSL	hsl(219, 53%, 55%)
HSV	hsv(219, 60%, 79%)
CMYK	cmyk(59.7%, 38.8%, 0%, 21.2%)
CIE-LAB	lab(51.98, 9.31, -44.93)
CIE-LCH	lch(51.98, 45.89, 281.70°)
OKLab	oklab(58.9% -0.0183 -0.1276)
OKLCH	oklch(58.9% 0.129 261.8)
XYZ	xyz(21.0153, 20.1305, 58.0251)
Luminance	0.2013 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517BC9 #C99F51

analogous

#51B7C9 #517BC9 #6351C9

triadic

#517BC9 #C9517B #7BC951

tetradic

#517BC9 #C951B7 #C99F51 #51C963

square

#517BC9 #C951B7 #C99F51 #51C963

split-complementary

#517BC9 #C96351 #B7C951

monochromatic

#26437A #345DA9 #517BC9 #809ED7 #AEC2E6

Accessibility & contrast

On white

4.18

#517BC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.03

#517BC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517BC9

5.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517BC9	#FFFFFF	#000000	##000000
##517BC9	1.00	4.18	5.03	5.03
#FFFFFF	4.18	1.00	21.00	21.00
#000000	5.03	21.00	1.00	1.00
##000000	5.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A82CC

Deuteranopia (green-blind)

#4977C7

Tritanopia (blue-blind)

#008C98

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #517bc9;
/* rgb */ color: rgb(81, 123, 201);
/* oklch */ color: oklch(58.9% 0.129 261.8);

Tailwind

colors: {
  custom: {
    50: '#8ca0da',
    500: '#517bc9',
    950: '#000000',
  },
}

SCSS

$custom: #517bc9;
$custom-light: #8ca0da;
$custom-dark: #000000;

JSON

{
  "hex": "#517bc9",
  "rgb": {
    "r": 81,
    "g": 123,
    "b": 201
  },
  "hsl": {
    "h": 219,
    "s": 52.632,
    "l": 55.294
  },
  "oklch": {
    "l": 0.58898,
    "c": 0.12888,
    "h": 261.8
  },
  "luminance": 0.20132
}

Semantic roles & 50–950 ramp

primary

#517BC9

secondary

#D4C2A2

accent

#AA4CDC

background

#F9F9FD

surface

#F1F2FA

border

#CBCCD3

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #517BC9

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

Preview Lab → · Contrast checker → · Palette generator →