finally :)

flake.lock

@@ -34,16 +34,16 @@
     "rainbow-vim-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1362455266,
-        "narHash": "sha256-R5daQm0G9BgRiCaR2KUfMrxy9ZBHftUrKYZgSGskiOM=",
-        "owner": "kien",
-        "repo": "rainbow_parentheses.vim",
-        "rev": "eb8baa5428bde10ecc1cb14eed1d6e16f5f24695",
+        "lastModified": 1590654574,
+        "narHash": "sha256-PH4UY+/1JFrR5C0DpFrkfTc51wUQet8ynvAPKFxbFZk=",
+        "owner": "luochen1990",
+        "repo": "rainbow",
+        "rev": "4d15633cdaf61602e1d9fd216a77fc02e0881b2d",
         "type": "github"
       },
       "original": {
-        "owner": "kien",
-        "repo": "rainbow_parentheses.vim",
+        "owner": "luochen1990",
+        "repo": "rainbow",
         "type": "github"
       }
     },

flake.nix

@@ -10,7 +10,7 @@
     };
 
     rainbow-vim-src = {
-      url = "github:kien/rainbow_parentheses.vim";
+      url = "github:luochen1990/rainbow";
       flake = false;
     };
     vim-racket-src = {

overlay.nix

@@ -44,23 +44,16 @@ customPlugins: self: super: {
           set backspace=eol,indent,start
           set tabstop=2 softtabstop=2 expandtab shiftwidth=2 smarttab
 
-          au VimEnter * RainbowParenthesesToggle
-          au Syntax * RainbowParenthesesLoadRound
-          au Syntax * RainbowParenthesesLoadSquare
-          au Syntax * RainbowParenthesesLoadBraces
-
-          let g:rbpt_colorpairs = [
-            \ ['brown',       'RoyalBlue3'],
-            \ ['Darkblue',    'SeaGreen3'],
-            \ ['darkgray',    'DarkOrchid3'],
-            \ ['darkgreen',   'firebrick3'],
-            \ ['darkcyan',    'RoyalBlue3'],
-            \ ['darkred',     'SeaGreen3'],
-            \ ['darkmagenta', 'DarkOrchid3'],
-            \ ]
+          let g:rainbow_active = 1
       
           imap <C-L> λ
 
+          let g:rainbow_conf = {
+           \ 'ctermfgs': ['red', 'green', 'blue', 'cyan', 'magenta'],
+           \ 'cterms': ['bold']
+           \}
+
+
         '';
       };
     };