ORD Raster Manager TIF has White color outside Actual Ortho image

I have a series of Ortho Images for a corridor which have a white color outside the boundary of the actual Topo area.

I'd like to change this to black to match my screen background.

Is there a way of doing this without creating clip boundaries?

I imagine not as some of the actual topo pixels will be white?

Is my best option getting the images changed by the Aerial LiDAR company to a black background?