[Plugin] Display the color of color-hex-codes, color functions

[NNBnh]

Display the color of color-hex-codes and color functions is pretty helpful for writing CSS and UI design... VScode support this feature by default, while NeoVim have an acceptable plugin vim-hexokinase that do the job:

I hope Pepper could support for coloring:

• 6 digit hex codes (#FFFFFF).
• 3 digit hex codes (#FFF).
• RGB functions (rgb(100%, 100%, 100%), rgb(255, 255, 255)).
• RGBA functions (rgba( ... )).
• HSL functions (hsl( ... )).
• HSLA functions (hsla( ... )).

With styling options:

• Background.
• Foreground.
• Virtual (display a small colored square on the right).
• Sign column (a column next to the line numbers).

If you find this suggestion it's suitable to be built-in with the editor, feel free to label this issue with "Plugin" or "Plugin Idea".

[vamolessa]

This would be a feature for a plugin or a custom client.
However, as it is right now, there's no way for a plugin to interact with the view rendering,
so it would require some work either on the plugin system, the client/server protocol or both.