#517DCF#517DCF
#517DCF is a mid, vivid blue. Relative luminance 0.209; OKLCH L 59.7% C 0.135 H 261.8°. Best body text is #000000 at 5.18:1 contrast (WCAG AA passes).
Color values
| HEX | #517DCF |
|---|---|
| RGB | rgb(81, 125, 207) |
| HSL | hsl(219, 57%, 56%) |
| HSV | hsv(219, 61%, 81%) |
| CMYK | cmyk(60.9%, 39.6%, 0%, 18.8%) |
| CIE-LAB | lab(52.86, 10.11, -46.95) |
| CIE-LCH | lch(52.86, 48.03, 282.15°) |
| OKLab | oklab(59.68% -0.0192 -0.1335) |
| OKLCH | oklch(59.68% 0.135 261.8) |
| XYZ | xyz(21.9855, 20.9196, 61.8987) |
| Luminance | 0.2092 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Clear Blue
#247AFD
ΔE00 4.79
Lightish Blue
#3D7AFD
ΔE00 4.82
Windows Blue
#3778BF
ΔE00 4.87
Cornflower Blue
#5170D7
ΔE00 4.98
Dodger Blue
#3E82FC
ΔE00 5.00
Deep Sky Blue
#0D75F8
ΔE00 5.07
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#517DCF #CFA351
analogous
#51BCCF #517DCF #6451CF
triadic
#517DCF #CF517D #7DCF51
tetradic
#517DCF #CF51BC #CFA351 #51CF64
square
#517DCF #CF51BC #CFA351 #51CF64
split-complementary
#517DCF #CF6451 #BCCF51
monochromatic
#244582 #315EB2 #517DCF #81A1DC #B1C5E9
Accessibility & contrast
On white
4.05
#517DCF on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.18
#517DCF on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #517DCF
5.18:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##517DCF | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##517DCF | 1.00 | 4.05 | 5.18 | 5.18 |
| #FFFFFF | 4.05 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.18 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.18 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5984D2
Deuteranopia (green-blind)
#4879CD
Tritanopia (blue-blind)
#008F9C
Achromatopsia (no color)
#7E7E7E
Design tokens & code
CSS
--color: #517dcf; /* rgb */ color: rgb(81, 125, 207); /* oklch */ color: oklch(59.7% 0.135 261.8);
Tailwind
colors: {
custom: {
50: '#8ca2de',
500: '#517dcf',
950: '#000000',
},
}SCSS
$custom: #517dcf; $custom-light: #8ca2de; $custom-dark: #000000;
JSON
{
"hex": "#517dcf",
"rgb": {
"r": 81,
"g": 125,
"b": 207
},
"hsl": {
"h": 219.048,
"s": 56.757,
"l": 56.471
},
"oklch": {
"l": 0.59681,
"c": 0.13483,
"h": 261.8
},
"luminance": 0.20922
}Semantic roles & 50–950 ramp
primary
#517DCF
secondary
#D8C6A4
accent
#AB48E0
background
#F9F9FD
surface
#F1F2FB
border
#CBCCD4
text
#0D0F15
muted
#7E7E83