The blue and black theme is mixed up with the text “DEEPSEA” printed in vibrant green – added as a tribute to the color of James Cameron’s submersible, the Deepsea Challenger. This color effect is probably rather straight forward and not a color-changing effect like the 2014 Rolex Milgauss Z-Blue dial watch (hands-on here).
Of course replica Rolex is really into blue and black right now. The 2013 Rolex GMT-Master II day/night watch with a half blue and half black ceramic bezel might be a nice complimentary piece to the Deepsea D-Blue dial timepiece.
Otherwise, the Rolex Deepsea Sea-Dweller D-Blue is the same 44mm wide steel-cased super dive watch that replica Rolex uk has been producing, but with a distinct dial color.