Can't set custom colors

[waikoo]

Can I get some help here please?

I have nvim-web-devicons installed via packer. In nvim/after/plugin/web-devicon.lua I have the following content:

require("nvim-web-devicons").set_icon {
  css = {
    color = "blue",
  }
}

What else do I need to do to set the color?
It should work with fern, right? I have fern using this plugin via:

vim.g["fern#renderer"] = "nvim-web-devicons"

[alex-courtis]

You're missing the rest of the icon definition.

Try

  ["css"] = {
    icon = "",
    color = "Blue",
    cterm_color = "75",
    name = "Css",
  },

See :help gui-colors for available colours.