Camp Jupiter’s shirt from Rick Riordan’s The Heroes of Olympus series—now in black! Senatus Populusque Romanus! A NOTE TO PARENTS BUYING THESE SHIRTS AS PRESENTS! The “Camp Jupiter” shirt, according to the descriptions in the book, is a purple v-neck shirt with a yellow logo. If you are looking to match the book’s descriptions exactly for your child, that’s it! If you would still like to order the shirt in other colors, feel free!