Sampled from 3 of I Nasoni di Roma's App Store screenshots — background, accent and theme, measured by LaunchShots (not something Apple publishes).
#ECECEC bg
#CFCFCF
#FC3C34 accent
#111111 text
Are you walking near the Roman Forum or the Colosseo or somewhere in the World? You need water? Just locate you in the map and look around to find a free drinking fountain. But if your are in Rome and the battery is down just buy the book "I Nasoni di Roma" by Fabrizio DiMauro - Editrice Innocenti
Every shipping app on the App Store has gone through the same decisions you're working through right now: which screenshot goes first, what caption sits over it, which device frame to show, what color the background should be. The 4 screenshots above are I Nasoni di Roma's answers to those questions — they're public, they're real, and they made it through Apple's review.
What the numbers say: I Nasoni di Roma runs a mixed light-and-dark set where the background shifts from screenshot to screenshot (first shot #ECECEC) — each image has to stand on its own, so the captions carry more of the story. The accent colour we picked up, #FC3C34, is the one to reuse for badges, arrows and highlighted words if you borrow this look. Hit Use this style to open the editor with these exact colours and drop your own screenshot in.
Notice the first screenshot in particular. It's the one users see in search results and on the product page, and it's where most apps spend their best caption and tightest design. Look at the proportion of background to phone, where the text sits, what one thing the image is trying to communicate.
Want to see how other Book apps approach the same problem? Browse more Book apps in the showcase.
Open LaunchShots and design your App Store & Google Play screenshots — pick a device frame, drop captions, ship in minutes. Free, in your browser.
Open the screenshot editor →Closest background + accent colours among the listings we've analysed — useful when you want to see the same palette handled by a different team.