Hello,
I found a snippet of code that displays each tab with a | character on the internet, that is very useful however the background color it uses doesn't play well with my theme, I don't understand a lot of elisp so could you tell me which line to modify to make it fit my theme?
```
;; (OPTIONAL) Visualize tabs as a pipe character - "|"
;; This will also show trailing characters as they are useful to spot.
(setq whitespace-style '(face tabs tab-mark trailing))
(custom-set-faces
;; custom-set-faces was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
'(whitespace-tab ((t (:foreground "#555")))))
(setq whitespace-display-mappings
'((tab-mark 9 [124 9] [92 9]))) ; 124 is the ascii ID for '\|'
(global-whitespace-mode) ; Enable whitespace mode everywhere
```
Any help would be appreciated, thanks in advance c: