Sort by Color Option in Annotations Pane
Many people use colours as a personal category system (e.g. words spoken by the Saviour are in red, missionary scriptures are green, personal scriptures are in Blue, etc.)
On the annotation page, if it was possible to filter annotations based on the colour of highlight / underline used, it could help people using this marking method to locate their personally selected scriptures.
The feature to search notes and highlights by color is now completed and available in both beta and production. This should serve the need to be able to see just the notes or highlights identified by color.
Just click on the new full screen annotations icon that looks like a pencil writing on paper. Then you can filter to the color you want two ways. Either by clicking on the color shown on the left side or by typing the color you want in the search bar in the middle at the top of the page.
Shawn Anderson commented
Also, those with learning disabilities (ADD/ADHD etc) are far more prone to use color to mentally categorize and find their thoughts.