Sampled from 6 of HTML Local Library for Safari's App Store screenshots — background, accent and theme, measured by LaunchShots (not something Apple publishes).
#F4F4F4 bg
#D6D6D6
#94BCE4 accent
#111111 text
Reading the caption text from the screenshots in your browser…
HTML Local Library for Safari helps you organize and manage local HTML files, allowing you to use them in Safari with an app-like experience. With the rise of AI tools, it has become easy to create HTML files containing interactive features such as calculators, business tools, and workflow forms. This app lets you import HTML files, organize them in a library, and open them in Safari. By using Safari’s Add to Home Screen feature, you can launch your HTML tools from your Home Screen with an experience similar to using a native app. HTML files run in Safari. HTML Local Library for Safari is a convenient tool for using your own HTML files or AI-generated HTML files on your iPhone and iPad.
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 15 screenshots above are HTML Local Library for Safari's answers to those questions — they're public, they're real, and they made it through Apple's review.
What the numbers say: HTML Local Library for Safari runs a mixed light-and-dark set where the background shifts from screenshot to screenshot (first shot #F4F4F4) — each image has to stand on its own, so the captions carry more of the story. The accent colour we picked up, #94BCE4, 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.