People probably aren't going to let presence in single-player cutscenes that nobody else can see affect their choice of accessories.
But they might let the digressing coloration affect their choices. PSO2 accessories can use the coloration of PSO2:NGS outfits but they don't match:
This is a shot from the closed beta: The PSO2 Oculus Hat using the Color 1 of the PSO2:NGS Mates Quarter setwear yet looking substantially darker. If there was an NGS equivalent default accessory hat that matched basewear/setwear Color 1 better, it would make more sense to use that instead. (And yes apparently you can use unused colours e.g. from CAST parts you're not wearing and set those to be a different shade to manually force it to match, but I think that might require an N-Color Change Pass).