Semi-permanent hair dye?

Hi ladies! I was wondering if anyone had any information on semi-permanent hair dye? I currently have medium/light brown hair but was looking to test out a dark brown almost black hair color. However, I’m not sure if I can fully commit to doing it yet so I stumbled across semi-permanent dye? Has anyone used this before — or heard about Clairol Natural Instincts?

Can I use heat products after using semi-permanent and will it wash out to my original hair color or???