I pieced the back of my first quilt today. I used solid colors and because I couldn't tell which side was the front and which side was the back, I didn't pay much attention to the "right" and "wrong" sides. When I stepped back to admire my work, I noticed that one of the blocks is "backwards" and it's a much darker shade than the rest of the back (I used Kona Cotton in Steel).
Do I need to take the row apart, flip the block over and resew it? If this was caused by ironing, will the color return to normal after I wash my finished quilt?