Hello
I understand that you want epub reader application. In this application, the user can add their favorite colors to the books. I have gone through all attached images and I understand what you exactly want in your application. The user can add RGB colors to the selected letters on the ebook. Like- All "W" will be in Red color, All "S" will be in Green color.
Please let me know whether my understanding is correct?
We would like to do this job so please let me know other requirements in detail.
We are a team of software developers who work on Microsoft technology stack like C#.NET, ASP.NET, SQL Server, WPF, WCF, Sharepoint, MVC etc.
Other skills- HTML5, CSS, JQuery, Bootstrap, JavaScript.
We can schedule a chat/call for further discussion.
Thanks,
Smita