#517FDA#517FDA

#517FDA is a mid, vivid blue. Relative luminance 0.220; OKLCH L 60.8% C 0.148 H 262.6°. Best body text is #000000 at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#517FDA
RGB	rgb(81, 127, 218)
HSL	hsl(220, 65%, 59%)
HSV	hsv(220, 63%, 85%)
CMYK	cmyk(62.8%, 41.7%, 0%, 14.5%)
CIE-LAB	lab(54.01, 12.63, -51.33)
CIE-LCH	lch(54.01, 52.86, 283.82°)
OKLab	oklab(60.77% -0.019 -0.1463)
OKLCH	oklch(60.77% 0.148 262.6)
XYZ	xyz(23.6332, 21.9879, 69.3147)
Luminance	0.2199 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517FDA #DAAC51

analogous

#51C3DA #517FDA #6751DA

triadic

#517FDA #DA517F #7FDA51

tetradic

#517FDA #DA51C3 #DAAC51 #51DA67

square

#517FDA #DA51C3 #DAAC51 #51DA67

split-complementary

#517FDA #DA6751 #C3DA51

monochromatic

#1F4592 #2A5EC4 #517FDA #83A4E5 #B6C9EF

Accessibility & contrast

On white

3.89

#517FDA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.40

#517FDA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517FDA

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517FDA	#FFFFFF	#000000	##000000
##517FDA	1.00	3.89	5.40	5.40
#FFFFFF	3.89	1.00	21.00	21.00
#000000	5.40	21.00	1.00	1.00
##000000	5.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5688DE

Deuteranopia (green-blind)

#417BD8

Tritanopia (blue-blind)

#0094A2

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #517fda;
/* rgb */ color: rgb(81, 127, 218);
/* oklch */ color: oklch(60.8% 0.148 262.6);

Tailwind

colors: {
  custom: {
    50: '#8ea3e6',
    500: '#517fda',
    950: '#000000',
  },
}

SCSS

$custom: #517fda;
$custom-light: #8ea3e6;
$custom-dark: #000000;

JSON

{
  "hex": "#517fda",
  "rgb": {
    "r": 81,
    "g": 127,
    "b": 218
  },
  "hsl": {
    "h": 219.854,
    "s": 64.929,
    "l": 58.627
  },
  "oklch": {
    "l": 0.60767,
    "c": 0.14751,
    "h": 262.6
  },
  "luminance": 0.2199
}

Semantic roles & 50–950 ramp

primary

#517FDA

secondary

#DECCA8

accent

#AF40E8

background

#F9FAFE

surface

#F2F3FC

border

#CCCDD5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #517FDA

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

Preview Lab → · Contrast checker → · Palette generator →