I ombré dyed our duvet cover ages ago, and then I had about ten ladies over for an ombré dyeing party, yet I'm somehow only just now managing to scrape together a tutorial! I'll be sure to show you the duvet cover sometime soon, along with tips and tricks for dyeing such a large piece. In the meantime, you should try this. A couple of my ombré crafternoon party attendees dyed swimsuit coverups, and they turned out just as summery as can be. I definitely recommend a nice, bright lemon yellow for summer, and it fades light to dark really well!
If you have questions after you read through everything, leave 'em in the comments on
this post, and I'll reply as soon as I can. There's a little bit of a learning curve to get a really nice, gradual fade, but it's fun to learn!