Here’s my submission. Bottom two have “VISIT” added in, whilst most people in the community should know, it’s to emphasise .io is a domain they can actually go to.
Simple, clean and tied in with website branding as well as actual colours
Direct Link: https://i.imgur.com/zbn0E2i.jpg
EDIT: Just a quick edit before you choose the winner as I noticed others had mentioned the same. I’m a designer by career choice so whatever format you need these in, I can supply. If you need help finding a sticker printer I’ll also lend a hand and see if they need the stickers in a certain format and adapt the design if required! Good luck everyone.