Quoted Message: I like both backgrounds. Concept to me is good: The falling hammer indicates construction site accident, but the man is wearing a bicycle helmet, which indicates wrong safety gear for construction.
+1 for the comment above.
Also, I prefer white background, too. it's very easy to create the radial background, but it is much harder to remove.
Hi! In stock the vast majority prefer the white background for more sales.But is not a rule. And the exception proves the rule. Concept is more important than background color. And your concept is cool!Congratulations!:)
Ricardotoledo, is not a rule.Look carefully on site and you'll notice that their portfolio contributors hundreds of sales that have nothing to do with white background.That there are many buyers who prefer white that's another story.You can sell stock photography without to do on white background.More chances to sales for you are when you find niche and concept.Must try to see what look you sell, what is required.Cheers!
Quoted Message: Thank you for our advice. It is not a bicycle helmet but a professional helmet which could protect from falling hammer !
That's a valid point. But, my personal suggestion is always using usual props in stock images. Maybe it's a very high quality helmet, but it doesn't make the viewer think of a "construction helmet" at first sight. Some objects have symbolic values. The old fashioned telephones are a good example of this. Noone use those phones anymore but we still use them as "contact us" icons.
Still, that helmet may be a good subject to another specific image with a title "high quality construction helmet".
My 2c - lose the radial and go with a plain (uniform) red so you keep the danger vibe without losing the flexibility of the isolation AND / OR submit a png (with transparancy) as additional at the same time.