#517ECB#517ECB

#517ECB is a mid, vivid blue. Relative luminance 0.210; OKLCH L 59.7% C 0.128 H 260.5°. Best body text is #000000 at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#517ECB
RGB	rgb(81, 126, 203)
HSL	hsl(218, 54%, 56%)
HSV	hsv(218, 60%, 80%)
CMYK	cmyk(60.1%, 37.9%, 0%, 20.4%)
CIE-LAB	lab(52.93, 8.16, -44.58)
CIE-LCH	lch(52.93, 45.32, 280.37°)
OKLab	oklab(59.66% -0.0211 -0.1265)
OKLCH	oklch(59.66% 0.128 260.5)
XYZ	xyz(21.6299, 20.9809, 59.3982)
Luminance	0.2098 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517ECB #CB9E51

analogous

#51BBCB #517ECB #6151CB

triadic

#517ECB #CB517E #7ECB51

tetradic

#517ECB #CB51BB #CB9E51 #51CB61

square

#517ECB #CB51BB #CB9E51 #51CB61

split-complementary

#517ECB #CB6151 #BBCB51

monochromatic

#25457C #3360AC #517ECB #80A1D9 #AFC4E7

Accessibility & contrast

On white

4.04

#517ECB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.20

#517ECB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517ECB

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517ECB	#FFFFFF	#000000	##000000
##517ECB	1.00	4.04	5.20	5.20
#FFFFFF	4.04	1.00	21.00	21.00
#000000	5.20	21.00	1.00	1.00
##000000	5.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D85CE

Deuteranopia (green-blind)

#4D79C9

Tritanopia (blue-blind)

#008F9B

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #517ecb;
/* rgb */ color: rgb(81, 126, 203);
/* oklch */ color: oklch(59.7% 0.128 260.5);

Tailwind

colors: {
  custom: {
    50: '#8ca3db',
    500: '#517ecb',
    950: '#000000',
  },
}

SCSS

$custom: #517ecb;
$custom-light: #8ca3db;
$custom-dark: #000000;

JSON

{
  "hex": "#517ecb",
  "rgb": {
    "r": 81,
    "g": 126,
    "b": 203
  },
  "hsl": {
    "h": 217.869,
    "s": 53.982,
    "l": 55.686
  },
  "oklch": {
    "l": 0.59664,
    "c": 0.12824,
    "h": 260.5
  },
  "luminance": 0.20983
}

Semantic roles & 50–950 ramp

primary

#517ECB

secondary

#D5C3A3

accent

#A74ADD

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0F15

muted

#7E7E83

Preview Lab

Preview with #517ECB

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

Preview Lab → · Contrast checker → · Palette generator →