This is what a relship "looks like" coming towards you. You'd see it on your ship's telemetry provided you are also reality skimming. It can't be observed from a non-skimming platform like a station or planet. Sevildom used nervecloth tech to render spacescapes under skim. Reetions use a variety of solutions which may or may not translate to an analogy display.
The inspiration for approaching ships being blue (and receding ones being red) is, of course, red-shift. But this is a telemetry decision used by nervecloth designers for its intuitive value.
Art by Yukari Yamamoto.
Lore posts feature aspects of the in-world Okal Rel Universe such as settings, in-world history, characters, cultures, technology, etc. For a concise (and free!) overview check out The Official Guide to the Okal Rel Universe on Wattpad.