Thought I'd mention, a friend of mine has little extensions put into her hair every couple of months, little bits of purplish metallic shiny bits. They hold up just fine with the washing and brushing and such, but you need to redo due to root growth.
If you want to play with the look and chalk isn't the answer, maybe a few temporary clips can be fun:
https://www.amazon.com/color-hair-ex...nsions+clip+in