I personally favor the neon orange, on several crafts. The 2nd is the neon green... but that's just my preference.Hi,
I'd guess that you won't see the (very nice!) blue one when flying against a blue sky.
That's why I'm considering orange or 'Japan red'
What's your experience?
Although to be seen in sky, it's more contrast than color. A black or Dk Grey is very visible in sky too. The "color" at a distance isn't as detectable as the contrast to background. A white Phantom is quite visible too due to contrast.
That said, a Dk Blue or a Blue that contrasts the sky would be visible... especially if light grey sky. If you fly with Tree line background, a darker color tends to blend.
The OEM color of the Mini in my opinion is very poor and blends with sky very quickly... add that to the small silhouette of craft, it disappears quickly.
Pick a color you enjoy, it serves more for close up and static enjoyment than it does for distance... any contrast will improve the visual for the Mini.