I am generally not a pre-washer. Flannels are always pre-washed cause they shrink up so differently. I usually run my hands or a light cloth along darker fabrics to see if there is any transfer, if so than wash but otherwise not. I do wash all my "usable" quilts with a couple of Shout color catchers before the quilt goes out the door. I have been fortunate and have never had a problem with colors running in my 200 plus quilts that I have made. Maybe I am just lucky!
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My newest Grandson, Caleb Austin, was born May 29th. I am now Grandma to 4 precious babies. I am so blessed!!!!