Pretty sure the solid colors are for people who need to shine a specific color of light, and there’s no simpler way to quickly do that. You either download a new app, or google image search and try to find something you can zoom in with.
The sound effects one I have no idea, haha
The simpler method is to load whatever stock application that came on your mobile device/computer OS that allows you to color the screen exactly as you desire. They’re offline too.
Remember in the very early days of the apple app store they had shit like a virtual beer so if you held the phone up to your lips it looked like you were drinking a mug of beer? Pointless but kind of showed off the phone’s capabilities? There would have been an app for put whatever color you want on the screen" with a set of RGB sliders. But nowadays that thing would require file access, phone, SMS, camera and payment permissions and would ruin your life for installing.
