I guess you didn’t notice that blue is a very common choice for TV news studio background:
https://www.google.fr/search?q=news+studio&safe=off&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjHobufpInUAhWDPRoKHReMC44Q_AUICigB&biw=1325&bih=630
And that the anchor wore yellow was likely a coincidence - they typically have a set of colors to choose from to make sure it looks good on camera. Yellow is a good, contrasting color for a blue background, so a natural choice.
There is no need to search for conspiracy or some hidden meaning in everything, even when it is from Russia.
