Same color and mesh, but different color

I’m using two pieces for my walls. The gray part is the exact same color in paint.net, but on here the top part is a different color. I’m using point lights and the lightmaps for the pieces (which are both a standard cube mesh) are both 128. Could someone please help?

Never mind, I fixed it! I have no idea how, though.

Hello GizmoUnrealer

Can you “mark” this question as “resolved” then? And can we learn how did you fixed it for other users of UE 4 can fix it if occurs.

Thank you.