The guidelines in this topic shouldn't take the place of a graphic designer assembling or reviewing your design, but they will help you avoid some design pitfalls when creating a new style or editing an existing one.
Check to make sure...
- there is enough color contrast to keep the text readable.
- your style elements look good at different zoom levels.
- your design is usable to colorblind viewers.
- for mobile designs, make sure your design works with Night mode.