I do a test seam with whites and most pale fabrics to see if the seam allowance is going to shadow (show through on the front) before I start cutting the pieces. Yellow and pale pink solids frequently do the same as white. When the test seam shadows, I fuse a layer of inexpensive white muslin to the back of the fabric before cutting. Works like a charm. Until I started doing this I totally avoided using white in anything, so it's opened up a whole new world for me.