To change the fader color of a single track in Cubase 9.5 Pro, you can follow these steps:
1. Select the desired track in Cubase.
2. Go to the "Inspector" panel on the left side of the screen (if it's not visible, press "Ctrl+I" to show it).
3. In the "Inspector" panel, locate the "Track Color" section.
4. Click on the small color box next to "Track Color" to open the color palette.
5. Choose a new color from the palette, or define a custom color using the color picker.
6. Once you have selected the desired color, the track fader's color will be updated accordingly.
Note: These instructions are specific to Cubase 9.5 Pro, and the steps may vary slightly in different versions of Cubase.