local custom_highlights = function(C)
  return {
    HopNextKey               = { bg    = C.text, fg           = C.base, style = { "bold", "underline" } },
    HopNextKey1              = { bg    = C.text, fg           = C.base, style = { "bold" } },
    HopNextKey2              = { bg    = C.text, fg           = C.base, style = { "bold", "italic" } },
    DiagnosticUnderlineError = { style = { "undercurl" } },
    DiagnosticUnderlineWarn  = { style = { "undercurl" } },
    DiagnosticUnderlineInfo  = { style = { "undercurl" } },
    DiagnosticUnderlineHint  = { style = { "undercurl" } },
    DiagnosticUnderlineOk    = { style = { "undercurl" } },
  }
end

return custom_highlights