#517DCB#517DCB

#517DCB is a mid, vivid blue. Relative luminance 0.207; OKLCH L 59.4% C 0.129 H 261.1°. Best body text is #000000 at 5.15:1 contrast (WCAG AA passes).

Color values

HEX	#517DCB
RGB	rgb(81, 125, 203)
HSL	hsl(218, 54%, 56%)
HSV	hsv(218, 60%, 80%)
CMYK	cmyk(60.1%, 38.4%, 0%, 20.4%)
CIE-LAB	lab(52.65, 8.76, -45.02)
CIE-LCH	lch(52.65, 45.86, 281.02°)
OKLab	oklab(59.45% -0.02 -0.1278)
OKLCH	oklch(59.45% 0.129 261.1)
XYZ	xyz(21.5027, 20.7265, 59.3558)
Luminance	0.2073 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517DCB #CB9F51

analogous

#51BACB #517DCB #6251CB

triadic

#517DCB #CB517D #7DCB51

tetradic

#517DCB #CB51BA #CB9F51 #51CB62

square

#517DCB #CB51BA #CB9F51 #51CB62

split-complementary

#517DCB #CB6251 #BACB51

monochromatic

#25457C #335FAC #517DCB #80A0D9 #AFC3E7

Accessibility & contrast

On white

4.08

#517DCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.15

#517DCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517DCB

5.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517DCB	#FFFFFF	#000000	##000000
##517DCB	1.00	4.08	5.15	5.15
#FFFFFF	4.08	1.00	21.00	21.00
#000000	5.15	21.00	1.00	1.00
##000000	5.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C84CE

Deuteranopia (green-blind)

#4B78C9

Tritanopia (blue-blind)

#008F9A

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #517dcb;
/* rgb */ color: rgb(81, 125, 203);
/* oklch */ color: oklch(59.4% 0.129 261.1);

Tailwind

colors: {
  custom: {
    50: '#8ca2db',
    500: '#517dcb',
    950: '#000000',
  },
}

SCSS

$custom: #517dcb;
$custom-light: #8ca2db;
$custom-dark: #000000;

JSON

{
  "hex": "#517dcb",
  "rgb": {
    "r": 81,
    "g": 125,
    "b": 203
  },
  "hsl": {
    "h": 218.361,
    "s": 53.982,
    "l": 55.686
  },
  "oklch": {
    "l": 0.59447,
    "c": 0.12936,
    "h": 261.1
  },
  "luminance": 0.20728
}

Semantic roles & 50–950 ramp

primary

#517DCB

secondary

#D5C3A3

accent

#A84ADD

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0F15

muted

#7E7E83

Preview Lab

Preview with #517DCB

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

Preview Lab → · Contrast checker → · Palette generator →