The colors of the layers of my first 2D animation are wrong for some reason I've just created my first 2D animation and I used separate layers and the "voxel heat diffuse" addon that you can find here.

With it I've been able to make the 2d animation faster. But,anyway,there is a little problem and I don't know if it's caused by the addon. I rendered the first frame and I saw that some layer have odd colors. Can someone suggest to me where could be the mistake ?

This is the first rendered frame of the animation :



and this is how it appears on the 3D view :



You can find the blender file here. Thanks.
Found the solution with the help of "Mingfen Wang",that's "Just click the 'Diffuse BSDF' item, and select 'IAP_SHADELESS' shade, then render".