Window balance shoe?
Thanks for reaching out to us! Our 15-177 pivot shoe should do the trick. This is designed to work with the Series 152 coil springs.
You only need to replace what's broken, so if the pivot shoe on the other side of the window is in good shape, you don't have to replace it.
Let me know if you have any further questions!
No the color of the brake doesn't matter. I'd recommend inspecting both shoes for any signs of damage to it or the metal cam. The pivot shoe in your first photo looks fine but you can always replace both pivot shoes if you'd like.
If the springs aren't snapped or bent, you can reuse them. If you need new ones, I recommend weighing the window on the sash and dividing the weight by the number of springs in the window to determine the proper weights.