The second one looks alright! They're easy on the eyes and might look good blended or used together! The third might be okay as well. Of course, you can always play around with it! Colors are great experiments for art ^^
i think the second one is perfect. the third one is a little bit off, and the first one doesn't fit too well (in my opinion!)
Yeah they look cool! The center colour in the middle one looks a little off maybe?
Sure, these colors fit!