User blog comment:ChishioKunrin/Yang and the Color Purple/@comment-71.175.63.159-20170625011408

It gets even more interesting when you consider that Blake has gold/yellow attributes to her and in her outfits which complement Yang's gold/yellow theme. Her V4 outfit is the best example of this given all the gold piping on her boots. An early design of her even gave her gold/burnished armor and calico coloring (orange also being a color that Yang favors).

What amuses me even more is that their outfits tend to "match" in general style and cut (while still also displaying their own personal aesthetics). This is perhaps best seen with their recent V4 outfits. Yang and Blake are both wearing long-tailed jackets in their respective colors, both with crop tops, and knee or longer height boots. Yang, as you pointed out, has a very obvious purple scarf around her knee (reminiscent of her V1 outfit) and Blake, as I pointed out, has the gold piping in her boots.

To go a step further, their V2 mission alt outfits almost appear as though they just switched outfits. Blake suddenly has a butt-cape almost exactly like Yang's and a low-neck crop top, whereas Yang is now wearing stockings (just with garters per her aesthetic) and a longer top (it's even black and white/cream).

While I'm not saying their having similar outfit designs and complementary colors in said outfits points to their potential as a couple (although I do think it can be argued as such from an artistic point of view), I don't think it's coincidence either that they constantly match and complement each other visually.