I'm probably overthinking this, but would still appreciate advice 
I got all my bridesmaids getting ready robes for the morning of the wedding, I got myself a white one, and then the bridesmaids have coordinating colors with what their wearing on the wedding day, MOH in Dusty Rose and the rest of the BM's in Dusty Sage.
My mom will be with us for getting ready so I want to also get her a robe. But I'm struggling with what color to get her, she's wearing Navy to the wedding so I was thinking of getting her a Navy Robe but worried it doesn't fit the light color's of the rest of the girls, they do have a light grey and dusty blue that I like.
I will preface this by saying, yes this is 100% for a photo op, my photographer (which we originally only booked for 8 hours and was planning on having him arrive later in the afternoon) recently reached out that he took a "story telling" class and wanted to use our wedding to take what he's learned and apply it, so he has offered to be at our wedding all day (roughly 13 hours) to capture our wedding at no additional charge, so getting ready will be heavily photographed.
