Tweak kanagawa theme

lua/plugins/colorscheme.lua

@@ -1,6 +1,7 @@
 return {
 
---   'rose-pine/neovim', name = 'rose-pine',
+  -- 'rose-pine/neovim',
+  -- name = 'rose-pine',
   -- config = function()
   --   require('rose-pine').setup({
   --     styles = {
@@ -15,12 +16,24 @@ return {
   'rebelot/kanagawa.nvim',
   config = function()
     local kanagawa = require('kanagawa')
+
+    local dragon = {
+      ui = {
+        bg        = '#080808',
+        bg_m3     = '#262626',
+        bg_gutter = '#121212',
+      },
+    }
+
     kanagawa.setup({
       commentStyle = { italic = false },
       keywordStyle = { italic = false },
-      -- TODO: make background darker
+      colors = { theme = { dragon = dragon } },
     })
     kanagawa.load('dragon')
-  end
 
+    -- Override highlight groups
+    vim.cmd('highlight WinSeparator guifg=' .. dragon.ui.bg_m3 .. ' guibg=' .. dragon.ui.bg_m3)
+    vim.cmd('highlight MsgSeparator guifg=' .. dragon.ui.bg_m3 .. ' guibg=' .. dragon.ui.bg_m3)
+  end
 }