nvim/lua/plugins/ui/indent-blankline.lua

local highlight = {
	"RainbowRed",
	"RainbowYellow",
	"RainbowBlue",
	"RainbowOrange",
	"RainbowGreen",
	"RainbowViolet",
	"RainbowCyan",
}

local hooks = require("ibl.hooks")
-- create the highlight groups in the highlight setup hook, so they are reset
-- every time the colorscheme changes
hooks.register(hooks.type.HIGHLIGHT_SETUP, function()
	vim.api.nvim_set_hl(0, "RainbowRed", { fg = "#ED8796" })
	vim.api.nvim_set_hl(0, "RainbowYellow", { fg = "#EED49F" })
	vim.api.nvim_set_hl(0, "RainbowBlue", { fg = "#8AADF4" })
	vim.api.nvim_set_hl(0, "RainbowOrange", { fg = "#F5A97F" })
	vim.api.nvim_set_hl(0, "RainbowGreen", { fg = "#A6DA95" })
	vim.api.nvim_set_hl(0, "RainbowViolet", { fg = "#C6A0F6" })
	vim.api.nvim_set_hl(0, "RainbowCyan", { fg = "#8BD5CA" })
end)

vim.g.rainbow_delimiters = { highlight = highlight }
require("ibl").setup({
	scope = { highlight = highlight },
	exclude = { filetypes = { "dashboard" } },
})

hooks.register(hooks.type.SCOPE_HIGHLIGHT, hooks.builtin.scope_highlight_from_extmark)