created vesper filter

[krystalcampioni]

#130 😄 Tried to implement the Vesper filter. What do you think?

[una]

Hey! Thanks for this PR! Going to do a little review (sorry about the delay) -- Can you please submit just the cssgram.scss vesper.scss and updated JSON files? #210 is a good example!

[una]

I was playing around this this based on your PR and i'm wondering what you think about this:

filter: hue-rotate(-10deg) brightness(1.05) saturate(.9);

&:after {
  background: rgba(199, 220, 202, .58);

  mix-blend-mode: overlay;
}

(nothing in ::before)

[una]

Closing due to inactivity