what did I do wrong?
You made all paragraphs bold, you should have only made the introduction and summary paragraph bold. Introduction and summary are both direct child of body. You should make your synopsis paragraph have a color of #7a5cd, all your paragraphs are not this color. The first word of each paragraph gives away what the paragraph you are dealing with (so the summary paragraph starts with:
Posting full answers without explanation is not allowed, your code will work because you define a color for the paragraphs in the unordered list, but your
div p target more then just synopsis paragraph