OK, gorgi, I'll go with the frost excuse.
No, taking pix of dark skinned figs in a challenge. Depending on the lighting, they tend to look either somewhat whitish, or a fluorescent bluish purple. The problem is magnified when concentrating on more than a single fig. The camera perceives them a little differently than our eyes. Not sure why.
As far as VdB vs Vista, and throw in Negronne and Petit Negri (whichever of several spellings you want use), I am getting pretty close to concluding that they are all the same. I know that is heresy, but after watching several different plants of all of these, I am being led to conclude that they are all the same, though they may have some very slight variations or personalities. My Vistas this year are as big an Negronne ever gets, and far bigger than Vista has even been. One of my Vista plants has bluish-green unripe figs just like one of my VdBs has - it has never looked like that before. They all have the same leaves (yes, I will defy anyone to tell which leaf came from which variety). I have 20+ Celeste "variations" which all test the same, DNA-wise, at USDA. I can somewhat tell them apart, sometimes, but the wide diversity of "looks" all show up on each tree during the season, even if they have predominantly one style or personality. Yet, with rare exceptions, when I see any of them, I know they are Celestes, regardless of how much a particular fig diverges from what might be considered as the prototypical Celeste look.
See http://figs4funforum.websitetoolbox.com/post?id=3606425 Which I guess I will finally provide an answer to, tonight. Those are both from my "Santa Margherita" tree, picked about one inch apart on the same branch. Yes, one is probably 12-24 hours less ripe than the other, but the extra time will not make them look the same. So what made the difference? Climate? Water? Soil? Fertilizer? Neighbor's dog? They are as equal in culture an any two figs can be, but one might as well be blond and the other brunette. even though they are twins.