Bold caption top: heavy white type on one brand color
Bold caption top is the look App Screenshot Lab opens with: a heavy grotesk headline set flush left in white on one solid terracotta, and phones large enough to run off the bottom edge. The first panel opens like a cover, with your app's mark and name above a bigger headline, so the set reads as one brand from the first swipe.
Make it yours
Use your own brand color
Background color is a terracotta #C4512B. Paste your brand's main color there and keep Text color white; any color dark enough for white text keeps the captions readable at thumbnail size.
Change the cover panel
Panel 1 layout is set to Big headline, which shows your App name and a larger title. Set it to Same as the set when your first screen should be as large as the others.