The picture below shows a vintage Seiko 5 Actus. The blue color on the dial is called "electric blue" by some collectors. Seiko used this color very often during the 60’s and 70’s. Recently they made the SARB series of "vanac" style watches (2nd picture below). One of them has blue dial but doesn’t come close to the electric blue. I would go for it if it was. For now, my choice is still the one with brown dial.