Help changing header color of alpha-nvim plugin

[theeternalsw0rd]

Here is my alpha.lua

return {
  "goolord/alpha-nvim",
  event = "VimEnter",
  config = function()
    local alpha = require("alpha")
    local dashboard = require("alpha.themes.dashboard")

    -- Set header
    dashboard.section.header.val = {
      "                                                     ",
      "  ███╗   ██╗███████╗ ██████╗ ██╗   ██╗██╗███╗   ███╗ ",
      "  ████╗  ██║██╔════╝██╔═══██╗██║   ██║██║████╗ ████║ ",
      "  ██╔██╗ ██║█████╗  ██║   ██║██║   ██║██║██╔████╔██║ ",
      "  ██║╚██╗██║██╔══╝  ██║   ██║╚██╗ ██╔╝██║██║╚██╔╝██║ ",
      "  ██║ ╚████║███████╗╚██████╔╝ ╚████╔╝ ██║██║ ╚═╝ ██║ ",
      "  ╚═╝  ╚═══╝╚══════╝ ╚═════╝   ╚═══╝  ╚═╝╚═╝     ╚═╝ ",
      "                                                     ",
    }

    -- Set menu
    dashboard.section.buttons.val = {
      dashboard.button("e", "  > New File", "<cmd>ene<CR>"),
      dashboard.button("SPC ee", "  > Toggle file explorer", "<cmd>NvimTreeToggle<CR>"),
      dashboard.button("SPC ff", "󰱼  > Find File", "<cmd>Telescope find_files<CR>"),
      dashboard.button("SPC fs", "  > Find Word", "<cmd>Telescope live_grep<CR>"),
      dashboard.button("SPC wr", "󰁯  > Restore Session For Current Directory", "<cmd>SessionRestore<CR>"),
      dashboard.button("q", "  > Quit NVIM", "<cmd>qa<CR>"),
    }

    -- Send config to alpha
    alpha.setup(dashboard.opts)

    -- Disable folding on alpha buffer
    vim.cmd([[autocmd FileType alpha setlocal nofoldenable]])
  end,
}

and colorscheme.lua

return {
  "folke/tokyonight.nvim",
  priority = 1000,
  config = function()
    if vim.env.TERM == "linux" then
      require("tokyonight").setup({
        style = "night",
      })
    else
      require("tokyonight").setup({
        transparent = true,
        style = "night",
        on_highlights = function(highlights, colors)
          highlights.AlphaHeader = { fg = colors.purple }
        end,
        styles = {
          sidebars = "transparent",
          floats = "transparent"
        }
      })
    end
    vim.cmd("colorscheme tokyonight")
  end
}

As far as I can tell, this is the way to do it. I checked the value of :echo synIDattr(synIDtrans(hlID("AlphaHeader")), "fg#") while running and it indicates the correct hexcode for colors.purple. The color of the header for alpha remains unchanged as you can see in the screenshot. Not sure what to check next.

[hikipilling]

you need to set dashboard.section.header.opts.hl = 'AlphaHeader'