Kanken Laptop 15"

Fjallraven have cute pastel backpacks and tote bags. https://fjallraven.com.au/products/f-kanken-laptop-15 You can often buy them secondhand which would fit your budget. They do last forever so even at full price are a good investment.

Crumpler (Aussie brand) or Fjallraven (Swedish brand) laptop backpacks - trendy and incredibly practical for uni. https://fjallraven.com.au/collections/kanken-bags/products/f-kanken-laptop-15?variant=44424603828452 https://www.crumpler.com/products/year-on-year?variant=44385817034831

If you like the black, get the black! I'd personally save up for the version with the G-1000 fabric though. It'll survive getting thrown around during travel better, and you'd be able to wax it to keep the black looking nice and dark. Here's a pic I yoinked off of an eBay listing if you want to see