should work better now

lua/plugins/rainbow-delimiters.lua

@@ -0,0 +1,31 @@
+return {
+  'HiPhish/rainbow-delimiters.nvim',
+  event = 'VeryLazy',
+  config = function()
+    local rainbow = require('rainbow-delimiters')
+
+    vim.g.rainbow_delimiters = {
+      strategy = {
+        [''] = rainbow.strategy['global'],
+        vim = rainbow.strategy['local'],
+      },
+      query = {
+        [''] = 'rainbow-delimiters',
+        lua = 'rainbow-blocks',
+      },
+      priority = {
+        [''] = 110,
+        lua = 210,
+      },
+      highlight = {
+        'RainbowDelimiterRed',
+        'RainbowDelimiterYellow',
+        'RainbowDelimiterBlue',
+        'RainbowDelimiterOrange',
+        'RainbowDelimiterGreen',
+        'RainbowDelimiterViolet',
+        'RainbowDelimiterCyan',
+      },
+    }
+  end,
+}