Mouse-over colors gets reverted!

[meimeiriver]

So, I tried to change the ridiculous mouse-over color from DSM 6.2.3, changing ux-all.css

 

-r--r--r-- 1 root root 246136 Aug 22 00:25 ux-all.css
lrwxrwxrwx 1 root root     58 Aug 21 23:38 ux-all.css.gz -> /usr/syno/synoman/scripts/ext-3.4/ux/ux-all-default.css.gz
-rw-r--r-- 1 root root 246136 Aug 21 23:38 ux-all-default.css
-rw-r--r-- 1 root root  22091 Aug 21 23:38 ux-all-default.css.gz
-rw-r--r-- 1 root root 375716 May 12  2020 ux-all.js
-rw-r--r-- 1 root root  97145 May 12  2020 ux-all.js.gz
-rw-r--r-- 1 root root  27168 May 12  2020 ux-encrypt.js
-rw-r--r-- 1 root root   9493 May 12  2020 ux-encrypt.js.gz



root@Xpenology:/usr/syno/synoman/scripts/ext-3/ux# rm ux-all-default.css
root@Xpenology:/usr/syno/synoman/scripts/ext-3/ux# ln ux-all.css ux-all-default.css
root@Xpenology:/usr/syno/synoman/scripts/ext-3/ux# ls -la
total 808



lrwxrwxrwx 2 root root     55 Aug 22 00:27 ux-all.css -> /usr/syno/synoman/scripts/ext-3.4/ux/ux-all-default.css
lrwxrwxrwx 1 root root     58 Aug 22 00:27 ux-all.css.gz -> /usr/syno/synoman/scripts/ext-3.4/ux/ux-all-default.css.gz
lrwxrwxrwx 2 root root     55 Aug 22 00:27 ux-all-default.css -> /usr/syno/synoman/scripts/ext-3.4/ux/ux-all-default.css
-rw-r--r-- 1 root root  22091 Aug 22 00:27 ux-all-default.css.gz

 

 

2 minutes later, as you can see, DSM has had the audacity to revert my changes! Dafuq?! How can I break through this passive-aggressive wall of opposition, and get DSM to accept normal mouse-over colors that don't look the same as the background color?