**Yes**.

In <kbd>Ctrl</kbd><kbd>Alt</kbd><kbd>U</kbd>*> User preferences > Themes > 3D view*:

![enter image description here][1]

* The *Face Selected* color controls the color of the selected face

* The *Active Vert/Edge/Face* color controls the color of the last selected face.

However, I wouldn't recommend making these colors too similar, as there are differences between the selected faces and the last selected face (active) and it might be confusing if you can't tell if a face is active or selected.

Reducing the alpha can help smooth it a little.  
Comparison of default setting and with it set to the same color as selected faces:

![enter image description here][4] ![enter image description here][3]

Note that this value also affects active vertices and edges as well as faces.


  [1]: https://i.sstatic.net/OhUKI.png
  [3]: https://i.sstatic.net/Gpzrz.png (Set to the same as selected)
  [4]: https://i.sstatic.net/cxHES.png (Default (white))