When a stain on a white garment with a colored pattern extends over both parts of the garment, the area of the stain is determined by adding together the area of each part of the stain on white. So, for example, if the stain is altogether exactly the size of a gris, but part of it is on colored, it would be treated as less than a gris. If it is more than the size of the gris and one part on white is a quarter-gris and one part on white more than 3/4 of a gris, even if there is colored in between, it counts as larger than a gris.
In particularly pressing situations, there is may be room for leniency and a detailed, a specific question should be asked. Please get back to us with any further questions.