Get rid of gradient in Textfield and Buttons

I’m setting up a custom GUISkin and have gone through and setup the background and font. Everything looks fine except for a strange grey gradient that is appearing along the sides of the textfield and button. I’ve looked through all of the settings in GUISkin and haven’t been able to find anywhere that I can get rid of them. Here is what it looks like:

[28156-screen+shot+2014-06-23+at+9.32.58+am.png|28156]

Is it possible to get rid of those gradients?

The gradient is in your art.

My guess is that the edges of your art are using alpha anti-aliasing.