tune colors for cpp in astrodark

lua/plugins/astrodark.lua

@@ -3,6 +3,7 @@ return {
   lazy = false,
   priority = 1000,
   config = function()
+    local C = require('astrotheme.palettes.astrodark')
     require('astrotheme').setup({
       palette = 'astrodark',   -- String of the default palette to use when calling `:colorscheme astrotheme`
 
@@ -25,6 +26,25 @@ return {
         astrodark = {
         },
       },
+      highlights = {
+        global = {
+          modify_hl_groups = function(hl, c)
+          end,
+        },
+        astrodark = {
+          modify_hl_groups = function(hl, c) -- modify_hl_groups function allows you to modify hl groups,
+            hl.Type = { fg = c.Yellow }
+            hl.Comment = { italic = true }
+          end,
+          ['@lsp.mod.readonly'] = { bold = true },
+          ['@lsp.type.namespace.cpp'] = { fg = C.rb },
+          ['@lsp.type.variable'] = { fg = C.text },
+          ['Comment'] = { italic = true },
+          ['Type'] = { fg = C.dark_orange },
+          ['Structure'] = { link = 'Type' },
+          ['Constant'] = { fg = 'NONE' },
+        }
+      }
     })
     vim.cmd('colorscheme astrodark')
   end,