The best replacement for dark blue is navy blue.

The best alternatives to dark blue are rated as following:
★★★★★  navy blue
★★★★  royal blue
★★★★  light blue

Your alternative for dark blue is not listed? Suggest!
Speaking about dark blue, one probably shouldn't forget about light blue.

Other search terms related to dark blue and their ratings are:
★★★★★ light blue
You have in mind a companion for dark blue and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of dark blue in all years. Click on graph for more.
dark blue
navy blue
royal blue