App Store Screenshots – Colored background vs white background [on hold]

for a long time I'm wondering about this issue. I'm trying to understand what is the most efficient way to get the user attention when he scrolls the App Store. The main component who is responsible for this is the app screenshots.

Taking that the App Store background is white, I can see 2 approaches.

• Taking advantages of the white background color, creating high contrast text.
• Using colored background color, making the all screenshot with more contrast, tho text less highlighted

Samples (Top screenshots - mine. Bottom screenshots - real examples from successful apps):

What approach would you take? Thank you so much!