I thought this early screenshot may have been photoshopped because some of the things done here cannot be done in TE.
The Transport Slider Needle is transparent allowing the blue slider to show thru it. You can't do this in TE due to a BLACK background behind the needle (please remove the black background or make it editable, thanks). Note too the transparent fader caps.
The Transport Slider color can be changed but only with “Track View Unfocused Track Text” which also affects other things like value text but not unfocused text. It should be separated from this and put under "Control Bar | Modules | Transport" where it will feel more at home.
Duckbar found the Transport Slider actually has 2 settings: A color while playing and a color while stopped. TE has a ways to go to catch up with Duckbar and I hope it eventually will.