The question of the "best" orange dive watch depends heavily on personal preference, budget, and desired specifications. Orange dials are very popular for dive watches because they offer excellent legibility underwater.
Top models with orange dials that are highly regarded in the dive watch community include: DOXA Sub 300T Professional: DOXA is known for its orange dials and is often cited as the iconic orange dive watch.
OMEGA Seamaster Diver 300M: OMEGA offers models with vibrant orange accents or dials that guarantee the highest precision and reliability.
Seiko Prospex models (e.g., "Orange Sumo" or "Orange Turtle"): Seiko offers affordable yet very robust dive watches with orange dials that are very popular. When buying, pay attention to important features such as high water resistance (at least 200 m, preferably 300 m), a screw-down crown, scratch-resistant sapphire crystal, and good luminescence of the hands and indices.