Not exactly a programming thing, but I am considering which is more pleasing to the eye. 1) White background with black text 2) Light grey (240 240 240) background with black text 3) Dark grey ...

Always Light: Snapchat will always have a light background. Always Dark: Snapchat will always have a dark background. Custom: With a Snapchat Plus membership, you can select from custom app themes.

In Google Keep, you can either use a light theme with a white background or a less-fatiguing dark theme. Depending on which you choose, your note backgrounds will change in appearance.