Sampled from 3 of STL Viewer – 3D Model Viewer's App Store screenshots — background, accent and theme, measured by LaunchShots (not something Apple publishes).
#040C14 bg
#272E34
#24CCFC accent
#FFFFFF text
Reading the caption text from the screenshots in your browser…
STL View is an offline STL viewer, OBJ viewer, 3MF viewer and 3D model viewer for iOS. Open, inspect and share STL, OBJ or 3MF files for 3D printing and CAD-export workflows without uploading your models or creating an account. OPEN STL, OBJ AND 3MF FILES View binary and ASCII STL files Open geometry-only Wavefront OBJ models Open 3MF models, including project files exported from slicers Open models from your device using the iOS Files app or supported Open With and Share flows Reopen recently viewed models from your local Recent Files list Share a model only when you choose WORKING WITH 3MF 3MF is the 3D Manufacturing Format written by most modern slicers and CAD tools. STL View reads the geometry inside a 3MF package so you can check a part before you print it: Real-world units are read from the file, so dimensions are exact without choosing a unit Modifier meshes and negative vo…
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 6 screenshots above are STL Viewer – 3D Model Viewer's answers to those questions — they're public, they're real, and they made it through Apple's review.
What the numbers say: STL Viewer – 3D Model Viewer runs a dark set with one background colour (#040C14) carried across every screenshot — the listing reads as a single poster when the shots sit side by side in search results. The accent colour we picked up, #24CCFC, 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 Developer Tools apps approach the same problem? Browse more Developer Tools 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.