While in the Skyline mode, any foundations pointed to change color to orange.
I did find that exiting the game and restarting does seem to fix this.
Or change the color of all the affected foundations to something else and back again. Which is a big pain in the backside.
I do have all my foundations set to look like concrete. Not sure if that makes a difference or not.
That happens to me here, too. However, it changes the color only when you specify a different material than the "default". There the color does not change. And when you paste the colors are again as you built them.
While in the Skyline mode, any foundations pointed to change color to orange.
I did find that exiting the game and restarting does seem to fix this. Or change the color of all the affected foundations to something else and back again. Which is a big pain in the backside.
I do have all my foundations set to look like concrete. Not sure if that makes a difference or not.