There was a time when I had pink in my hair (with blonde) and also red. It took forever to get my hair back to blonde, and I'm the kind of person who would like to add crazy colors and then go back to blonde the next day...and hey! I found a way.
I'm sort of an artist so I have a lot of art supplies and I hadn't used my pastel's in forever! While browsing the internet I found someone talking about putting artist's chalk in hair to temporarily dye it cool colors, and it totally works!
Super easy too!
Just get whatever pastel colors you want. I went for blue and red (superman colors!). All I did was wet the chalk and a chunk of hair, then rub the chalk on it. After that I dried the hair with a hair dryer, although I think you can let it air dry, but I was crunched for time because I was about to film a video.
And that's it! It washes out too! If you have darker hair I imagine it might be a bit of a struggle to get the color to show, but apparently it's possible.
I've also heard that sidewalk chalk works too, but it's not very pigmented, so I'm going to stick with my art chalk. :)
Have you ever tried this??