How about being able to colour a folder if desired. I run an Airbnb and, as I use that folder a lot, it would be great if I could make the folder a colour to make it stand out easier from all the other folders?
Account Color Customization: By popular demand, you can now customize the color of your account icons. These colors also appear in the “From” selection when composing emails, adding a light personal touch to your email experience.