You can get the theme “Impulse Tracker” for Renoise from this link:
The theme “Impulse Tracker” for Piano Roll Studio you can achieve a similar look by setting the RGB values taken from the image capture (“RGB Colors Custom” Panel from PRS Preferences).
https://forum.renoise.com/uploads/default/original/2X/9/9165d21791a0e5d6c3d957f6e9c97a35e8ba6795.png
I think that image capture is quite old. PRS probably has more color options now. But you can get closer to that aspect by following the image capture.