You have already applied borderTopWidth: 2, and the remaining borders are set to 0, so you can directly use borderColor: 'rgb(225, 225, 225)' instead of borderTopColor: 'rgb(225, 225, 225)'. That worked for me.
borderTopWidth: 2
0
borderColor: 'rgb(225, 225, 225)'
borderTopColor: 'rgb(225, 225, 225)'