#517CCB#517CCB

#517CCB is a mid, vivid blue. Relative luminance 0.205; OKLCH L 59.2% C 0.131 H 261.6°. Best body text is #000000 at 5.10:1 contrast (WCAG AA passes).

Color values

HEX	#517CCB
RGB	rgb(81, 124, 203)
HSL	hsl(219, 54%, 56%)
HSV	hsv(219, 60%, 80%)
CMYK	cmyk(60.1%, 38.9%, 0%, 20.4%)
CIE-LAB	lab(52.37, 9.37, -45.46)
CIE-LCH	lch(52.37, 46.42, 281.65°)
OKLab	oklab(59.23% -0.019 -0.1291)
OKLCH	oklch(59.23% 0.131 261.6)
XYZ	xyz(21.3767, 20.4746, 59.3138)
Luminance	0.2048 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517CCB #CBA051

analogous

#51B9CB #517CCB #6351CB

triadic

#517CCB #CB517C #7CCB51

tetradic

#517CCB #CB51B9 #CBA051 #51CB63

square

#517CCB #CB51B9 #CBA051 #51CB63

split-complementary

#517CCB #CB6351 #B9CB51

monochromatic

#25447C #335EAC #517CCB #809FD9 #AFC3E7

Accessibility & contrast

On white

4.12

#517CCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.10

#517CCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517CCB

5.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517CCB	#FFFFFF	#000000	##000000
##517CCB	1.00	4.12	5.10	5.10
#FFFFFF	4.12	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)

#5A83CE

Deuteranopia (green-blind)

#4A78C9

Tritanopia (blue-blind)

#008E9A

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #517ccb;
/* rgb */ color: rgb(81, 124, 203);
/* oklch */ color: oklch(59.2% 0.131 261.6);

Tailwind

colors: {
  custom: {
    50: '#8ca1db',
    500: '#517ccb',
    950: '#000000',
  },
}

SCSS

$custom: #517ccb;
$custom-light: #8ca1db;
$custom-dark: #000000;

JSON

{
  "hex": "#517ccb",
  "rgb": {
    "r": 81,
    "g": 124,
    "b": 203
  },
  "hsl": {
    "h": 218.852,
    "s": 53.982,
    "l": 55.686
  },
  "oklch": {
    "l": 0.59231,
    "c": 0.1305,
    "h": 261.6
  },
  "luminance": 0.20476
}

Semantic roles & 50–950 ramp

primary

#517CCB

secondary

#D5C3A3

accent

#AA4ADD

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #517CCB

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

Preview Lab → · Contrast checker → · Palette generator →