My blue isn't your blue.
Her red isn't his red.
The Joneses yellow is more orange the the Smith's.
Nobody sees color just like the next person; therefore it nearly always behooves you (how about THAT old fashioned word!) to pick/choose/buy your own fabrics when you are having someone make clothing, quilts, drapes, chair covers, or baby things for you.
Let this be a lesson learned, keep the secret "close to the vest" - as they say in card games - and let your potential MIL believe it was perfect. Someday, years from now when you are as close as her daughter, you can tell the story and all have a great laugh about it.
Jan in VA, who makes commissions for people who are always required to be present when the fabrics are purchased for their quilts.