I do like those colors. Which reminds me. If I'm going for that style, I adore this type of image -
It also occurs to me that this is really a sci-fi romance rather than an actual sci-fi. So I should be looking at images in that area to see how to fit in and then stand out.
The covers in that area of Kindle look pretty amateur to me so maybe it won't be hard to stand out against most of them. Lots of time travel and werewolf stuff in here. So I have to make it clear it's about space, not just strange-on-Earth stuff. I like the ones with a sword against a nebula - I do have swords in my book and the nebula speaks of space. But how to combine that with this feel ...