1.0.0
release
Colored Rail Detector
Detector rails on colored blocks will only activate when the player is holding that item
Colored Rail Detector
Place your detector rails on top of a colored block (wool, concrete, concrete powder, terracotta, glazed terracotta) and it will not activate when players are passing by without them holding that exact item in their main hand.
Only required on the server, but adding it to the client will make it work in singleplayer.