I saw this gorgeous deep blue color--looks like it was made for ASOS. Sold out but sure is beautiful!
Try the Loch Blue at The Leather Satchel Company. Not quite as bright as your blue but not as dark as Navy. These guys are so nice and responsive. I should get my free swatches next week. If you have questions, they email you back almost immediately. I'm thinking of getting a custom satchel in Loch Blue and Charcoal black. I think I'll do just the gusset and the strap in the black, the rest all blue.
They do handles, and magnetic closures, custom sizes, wider gussets, they seem to be able to customize in very many ways.
http://the.leathersatchel.co/satchels/15-inch-loch-blue-leather-satchel.html