Layer not showing up correctly on export.

Hello all,

I am designing a box and trying to get these triangle shapes to overlay it. Here is how it looks in my viewport, which is what I am trying to get the finished product as. 

And here is what I am getting below.

The exported result is very faint black triangles on the brown box cover. It seems like it is filling in all the area except the triangles I need. Any ideas?