#517DDD#517DDD

#517DDD is a mid, vivid blue. Relative luminance 0.216; OKLCH L 60.5% C 0.154 H 263.9°. Best body text is #000000 at 5.33:1 contrast (WCAG AA passes).

Color values

HEX	#517DDD
RGB	rgb(81, 125, 221)
HSL	hsl(221, 67%, 59%)
HSV	hsv(221, 63%, 87%)
CMYK	cmyk(63.3%, 43.4%, 0%, 13.3%)
CIE-LAB	lab(53.64, 14.87, -53.62)
CIE-LCH	lch(53.64, 55.65, 285.50°)
OKLab	oklab(60.53% -0.0164 -0.153)
OKLCH	oklch(60.53% 0.154 263.9)
XYZ	xyz(23.7736, 21.6348, 71.3157)
Luminance	0.2164 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517DDD #DDB151

analogous

#51C3DD #517DDD #6B51DD

triadic

#517DDD #DD517D #7DDD51

tetradic

#517DDD #DD51C3 #DDB151 #51DD6B

square

#517DDD #DD51C3 #DDB151 #51DD6B

split-complementary

#517DDD #DD6B51 #C3DD51

monochromatic

#1D4396 #275AC9 #517DDD #84A3E7 #B7CAF1

Accessibility & contrast

On white

3.94

#517DDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.33

#517DDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517DDD

5.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517DDD	#FFFFFF	#000000	##000000
##517DDD	1.00	3.94	5.33	5.33
#FFFFFF	3.94	1.00	21.00	21.00
#000000	5.33	21.00	1.00	1.00
##000000	5.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5087E1

Deuteranopia (green-blind)

#3A7ADB

Tritanopia (blue-blind)

#0093A2

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #517ddd;
/* rgb */ color: rgb(81, 125, 221);
/* oklch */ color: oklch(60.5% 0.154 263.9);

Tailwind

colors: {
  custom: {
    50: '#8fa2e8',
    500: '#517ddd',
    950: '#000000',
  },
}

SCSS

$custom: #517ddd;
$custom-light: #8fa2e8;
$custom-dark: #000000;

JSON

{
  "hex": "#517ddd",
  "rgb": {
    "r": 81,
    "g": 125,
    "b": 221
  },
  "hsl": {
    "h": 221.143,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.60532,
    "c": 0.15391,
    "h": 263.9
  },
  "luminance": 0.21637
}

Semantic roles & 50–950 ramp

primary

#517DDD

secondary

#E0CFAA

accent

#B43EEA

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0D0F16

muted

#7E7E84

Preview Lab

Preview with #517DDD

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

Preview Lab → · Contrast checker → · Palette generator →