The three Slide bars correspond to Red, Green and Blue values respectively. First of all, a html script with background color information based on SlideBar inputs is generated. The Web View then uses the generated html script to build a html web-page.
Users can also use the EditText and Submit button to input hex values. Initially, I had not planned on putting this functionality. I later decided to add it because several people were giving bad ratings to similar app in the appstore for missing it. Also, it was a fairly simple addition.