I didn't have a problem getting a 100% match for this challenge, but I did want to check out some different approaches to see if I could shave the number of characters I used. The approach that ended up having the least code used absolute positioning for three divs inside the body, two with a width of 100 pixels, and one that took up the entire width of the frame. I defined a background color for each of those, and border-radius for the top one.
Check out my code