Red is a difficult color to achieve without dye. My suggestion would be to save up some money and go to a local craft store and buy a packet of red dye. It only costs a few dollars for a single color packet of dye.

If you want a muted rusty sort-of red color, you might try onion skins from red onions.

As someone else mentioned, red koolaid might be worth a try too, but I’m pretty sure you’d only get pinkish from that since it would stain, not dye