How to custom background color ?

[allworldg]

I use vim.cmd[[highlight Normal guibg = #F9F9F9]] to custom background color . It is useful. But when I move my cursor into the lsp hover float window, the whole background color change back to white . Then I disable this colorscheme, everything is right. I guess if I can custom color by using this theme config , maybe the problem can be solved .
Love your theme , Thank you .

[allworldg]

I have found it is a highlight buffer problem . I solve it . But I still want to know is there a config to set background color(not theme_style).

[ful1e5]

You can override colors with the overrides config in setup

require('github-theme').setup({
  -- ...
  overrides = function(c)
    return {
      Normal = { bg = '#000000', fg = '#ffffff' }, -- with Hex
      -- Normal = { bg = c.bg2, fg = c.fg },  -- Or with colors
    }
  end,
})

[allworldg]

Thank you.