#517FDB#517FDB

#517FDB is a mid, vivid blue. Relative luminance 0.220; OKLCH L 60.8% C 0.149 H 262.7°. Best body text is #000000 at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#517FDB
RGB	rgb(81, 127, 219)
HSL	hsl(220, 66%, 59%)
HSV	hsv(220, 63%, 86%)
CMYK	cmyk(63%, 42%, 0%, 14.1%)
CIE-LAB	lab(54.07, 12.97, -51.81)
CIE-LCH	lch(54.07, 53.41, 284.05°)
OKLab	oklab(60.83% -0.0188 -0.1477)
OKLCH	oklch(60.83% 0.149 262.7)
XYZ	xyz(23.7644, 22.0404, 70.0059)
Luminance	0.2204 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517FDB #DBAD51

analogous

#51C4DB #517FDB #6851DB

triadic

#517FDB #DB517F #7FDB51

tetradic

#517FDB #DB51C4 #DBAD51 #51DB68

square

#517FDB #DB51C4 #DBAD51 #51DB68

split-complementary

#517FDB #DB6851 #C4DB51

monochromatic

#1E4593 #295DC6 #517FDB #84A4E5 #B6CAF0

Accessibility & contrast

On white

3.88

#517FDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.41

#517FDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517FDB

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517FDB	#FFFFFF	#000000	##000000
##517FDB	1.00	3.88	5.41	5.41
#FFFFFF	3.88	1.00	21.00	21.00
#000000	5.41	21.00	1.00	1.00
##000000	5.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5588DF

Deuteranopia (green-blind)

#407BD9

Tritanopia (blue-blind)

#0094A2

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #517fdb;
/* rgb */ color: rgb(81, 127, 219);
/* oklch */ color: oklch(60.8% 0.149 262.7);

Tailwind

colors: {
  custom: {
    50: '#8ea3e7',
    500: '#517fdb',
    950: '#000000',
  },
}

SCSS

$custom: #517fdb;
$custom-light: #8ea3e7;
$custom-dark: #000000;

JSON

{
  "hex": "#517fdb",
  "rgb": {
    "r": 81,
    "g": 127,
    "b": 219
  },
  "hsl": {
    "h": 220,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.60828,
    "c": 0.14886,
    "h": 262.7
  },
  "luminance": 0.22043
}

Semantic roles & 50–950 ramp

primary

#517FDB

secondary

#DFCDA9

accent

#B03FE9

background

#F9FAFE

surface

#F2F3FC

border

#CCCDD5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #517FDB

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

Preview Lab → · Contrast checker → · Palette generator →