If the photo is making it look a darker shade then it will be Blue Metallic Cocktail 1. Code BMC1 as shown in the link from YamFazFan. This I believe is what is termed a candy colour, meaning the final shade depends on the base metallic paint, the depth of the semi transparent blue coat, and finally the clear coat all being correct. In short very difficult to get a perfect match. I am not a paint expert so description might not be perfect, but something like that.
The good news is you can get a reasonably close match using more normal paint and clear coat as long as you are doing a full panel and it is not up against an original painted panel. A belly pan and front mudguard fit into that category. Note I said reasonably close, it depends how fussy you are.