The t-shirts are B&C Heavy Cotton. Truest to color are the photos on the flat background. The orange is a muted dark orange. The purple is bright and the white is just - white :) The sweatshirt is from Fruit of the Loom.
The shirts and sweatshirts come with tiny mistakes, they have been silkscreen-printed with 4-5 print-runs each all around during hours and hours at Stattlab :)