Knight is a dark grey with a slight hint of blue. However, the blue is not very over-powering at all. In fact, you won't even notice it by itself. I only noticed it after I compared with with Smoke & Diamonds (from the Starflash collection last year). Knight would be great in any smokey eye look, or in the crease paired with any cool toned color on the lid.
Top to bottom: Knight, Smoke & Diamonds
Then there's Henna. Henna is a dark gold with slight olive undertone. I compared it with Mink & Sable (from Starflash collection), and they look really similar in the pot. But when swatched side by side, there is a distinct difference between those two. Henna has more gold to it; while Mink & Sable has more olive. I tried to capture the swatches with my camera, but it would not show the difference. So, anyways, if you already have Mink & Sable and you're on a budget, I'll say skip Henna. Otherwise, get it. It's really pretty and I love it so much.