#517DDE#517DDE

#517DDE is a mid, vivid blue. Relative luminance 0.217; OKLCH L 60.6% C 0.155 H 264.0°. Best body text is #000000 at 5.34:1 contrast (WCAG AA passes).

Color values

HEX	#517DDE
RGB	rgb(81, 125, 222)
HSL	hsl(221, 68%, 59%)
HSV	hsv(221, 64%, 87%)
CMYK	cmyk(63.5%, 43.7%, 0%, 12.9%)
CIE-LAB	lab(53.69, 15.21, -54.09)
CIE-LCH	lch(53.69, 56.19, 285.71°)
OKLab	oklab(60.59% -0.0163 -0.1544)
OKLCH	oklch(60.59% 0.155 264)
XYZ	xyz(23.9072, 21.6883, 72.0194)
Luminance	0.2169 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517DDE #DEB251

analogous

#51C3DE #517DDE #6C51DE

triadic

#517DDE #DE517D #7DDE51

tetradic

#517DDE #DE51C3 #DEB251 #51DE6C

square

#517DDE #DE51C3 #DEB251 #51DE6C

split-complementary

#517DDE #DE6C51 #C3DE51

monochromatic

#1D4398 #275ACB #517DDE #84A3E8 #B8CAF2

Accessibility & contrast

On white

3.93

#517DDE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.34

#517DDE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517DDE

5.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517DDE	#FFFFFF	#000000	##000000
##517DDE	1.00	3.93	5.34	5.34
#FFFFFF	3.93	1.00	21.00	21.00
#000000	5.34	21.00	1.00	1.00
##000000	5.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F87E2

Deuteranopia (green-blind)

#387ADC

Tritanopia (blue-blind)

#0093A3

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #517dde;
/* rgb */ color: rgb(81, 125, 222);
/* oklch */ color: oklch(60.6% 0.155 264.0);

Tailwind

colors: {
  custom: {
    50: '#8fa2e9',
    500: '#517dde',
    950: '#000000',
  },
}

SCSS

$custom: #517dde;
$custom-light: #8fa2e9;
$custom-dark: #000000;

JSON

{
  "hex": "#517dde",
  "rgb": {
    "r": 81,
    "g": 125,
    "b": 222
  },
  "hsl": {
    "h": 221.277,
    "s": 68.116,
    "l": 59.412
  },
  "oklch": {
    "l": 0.60594,
    "c": 0.15526,
    "h": 264
  },
  "luminance": 0.2169
}

Semantic roles & 50–950 ramp

primary

#517DDE

secondary

#E1D0AA

accent

#B53DEB

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0F16

muted

#7E7E84

Preview Lab

Preview with #517DDE

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

Preview Lab → · Contrast checker → · Palette generator →