require('indent_blankline').setup {char = " ", filetype_exclude = {'help', 'terminal'}}

-- define the highlight groups with only background colors (or leave odd empty to just show the normal background)
vim.cmd [[highlight IndentOdd guifg=NONE guibg=NONE gui=nocombine]]
vim.cmd [[highlight IndentEven guifg=NONE guibg=#354254 gui=nocombine]]
-- and then use the highlight groups
vim.g.indent_blankline_char_highlight_list = {"IndentOdd", "IndentEven"}
vim.g.indent_blankline_space_char_highlight_list = {"IndentOdd", "IndentEven"}

-- don't show any characters
vim.g.indent_blankline_char = " "
vim.g.indent_blankline_space_char = " "

-- when using background, the trailing indent is not needed / looks wrong
vim.g.indent_blankline_show_trailing_blankline_indent = false