NIP-84: add highlight colors

[ChristianChiarulli]

No description provided.

[vitorpamplona]

Not against this, but why would a highlight writer set up the color that the reader should see?

Also no "additional color formats". Let's just pick one and stick with it so we don't need to code lots of decoders.

[ChristianChiarulli]

i think most clients will ignore it but if you wanted a more personal client where the user only sees their own highlights it could be useful.

we can probably just go with hex, if you agree i'll update the nip to just use that.

[pablof7z]

yeah, either don't do it or just leave it as a single format, hex might make sense, or perhaps hsl would be better since its marginally better to compute a color that works in light/dark mode settings

[staab]

I think just hue would probably be best. Then clients can adjust the saturation and lightness to fit their theme.