She'll go back to being dark in the winter, the reddish look was just sunburn, and she should shed out to about the same blue color every summer.
Roan horses are funny. This winter Rusty looked like a solid bay. I don't reallly know when it happened but now he looks very white on his body. It just happened:) I think he's looked dull because he's still shedding. Yesterday out in the sun he looked better.
Becky