Keep in mind that henna is permanent. And, color from a gloss will only show up on light hair.
Originally Posted by RedCatWaves

My hair is fairly light, I think- although maybe that is because I continue to identify as having blonde hair. I wish I had added some cassia to my order, didn't even think of it.

I hennaed a few years back and I got a really red result- redder than what I really wanted, but it was ok. A gloss seems like it could be a compromise. For the price of a sample, it is worth a try.