feat: add custom_highlights option

README.md

@@ -142,6 +142,14 @@ All options are optional — defaults work out of the box.
 require("lume").setup({
   transparent = false, -- set to true to use your terminal's background
   italics = true,      -- set to false to disable italic comments/keywords
+  custom_highlights = function(colors, variant)
+    -- colors contains: backgrounds, foregrounds, accents, ansi, special
+    -- variant is "dark" (or "light" when a light theme is added)
+    return {
+      Normal = { bg = "#1E1F2E" },
+      MiniDiffSignAdd = { fg = colors.accents.sage },
+    }
+  end,
 })
 ```
 

lua/lume/init.lua

@@ -3,6 +3,7 @@ local M = {}
 local defaults = {
   transparent = false,
   italics = true,
+  custom_highlights = nil,
 }
 
 M.config = vim.deepcopy(defaults)

lua/lume/theme.lua

@@ -56,6 +56,19 @@ function M.apply(config)
     load_module(mod, false)
   end
 
+  -- Apply custom highlights
+  if config.custom_highlights then
+    local custom = config.custom_highlights
+    if type(custom) == "function" then
+      custom = custom(p, "dark")
+    end
+    if type(custom) == "table" then
+      for k, v in pairs(custom) do
+        groups[k] = vim.tbl_extend("force", groups[k] or {}, v)
+      end
+    end
+  end
+
   for group, settings in pairs(groups) do
     vim.api.nvim_set_hl(0, group, settings)
   end