Sampled from 6 of LookUp: English Dictionary App's App Store screenshots — background, accent and theme, measured by LaunchShots (not something Apple publishes).
#242424 bg
#424242
#A44CA4 accent
#FFFFFF text
Reading the caption text from the screenshots in your browser…
Build your English vocabulary the smart way. LookUp combines an Oxford-powered dictionary with beautiful Word of the Day, spaced repetition quizzes, and personal word collections, all in one award-winning app. Discover words beautifully: A new illustrated Word of the Day, every day. Visual memory aids make new words stick faster than reading definitions alone. Tap the widget on your Home Screen or Lock Screen to never miss a word. Look up any word, instantly: Powered by Oxford English Dictionary; the world's most trusted source. Get definitions, thesaurus, audio pronunciations, example sentences, usage notes, and translations in 20+ languages. Build your personal vocabulary: Save words to your own collections. Then master them with flashcards, example sentence quizzes, conversation practice, and interactive exercises — all powered by scientifically proven Spaced Repetition. Perfect …
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 14 screenshots above are LookUp: English Dictionary App's answers to those questions — they're public, they're real, and they made it through Apple's review.
What the numbers say: LookUp: English Dictionary App runs a dark set where the background shifts from screenshot to screenshot (first shot #242424) — each image has to stand on its own, so the captions carry more of the story. The accent colour we picked up, #A44CA4, 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 Reference apps approach the same problem? Browse more Reference 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.