There is no law that says that you have to follow the designer's suggestions. I seldom do. I absolutely agree with your choice of a softer white. Put the chart in your shopping cart. You can then purchase the flosses you need. You can buy all the floss at one time. Or, if you have a stash of flosses, only order the ones that you need. You should see a prompt that will allow you to choose the fabric you prefer.

This will be a lovely piece when you are finished.