I have the blonde / charcoal interior and I m so glad I wasn t afraid to choose this color. I have kids as well and of course, the dirt gets visible but it s very very easy to clean. I think it s the best looking interior by far, especially combined with the mat walnut.
You will read on this forum lots of people choosing black because it s easier with kids, and also because you won t see the dye transfer, lots of people choosing amber because the the darker tone is easier than the blonde leather to keep clean, but you will notice that a LOT of people love the blonde, but were afraid to go for it because of the dye transfer and/or because they have kids.
You will also notice from the blonde leather owners that it s very easy to keep it looking like new with regular maintenance using the Volvo leather kit. Also, I could not find a blonde leather owner who had regrets about his choice.
So if you have a crush on the blonde leather: go for it !! You won t regret.
However, I have a friend who got the blonde/blonde interior and who is going crazy keeping the floor clean. Go for the blonde/charcoal for sure. It looks great and it won t drive you mad.