I have used the chalk pounce to mark my quilts for a long time. Unless something has changed the white is the only one that you remove with a hot iron. I do hand quilting when I do a large area I like taking it off as I go. Don't forget to iron your quilt to remove the chalk before washing . I called the company when I was selling the product to see if they had colors and they cannot make color that can be removed with heat. so I suggest use the color and to see if it washes out ok before you mark your quilt. Suggest to your shop to get informed keep this ready to demo they will increase their sales.
I love the pounce original only white.
Hope this is helpful.