GUI – Color UI hovering

I do not really know if it can be posted here, so instead of asking my question, I will gladly delete this if it is a crime for some.

I am stuck in the user interface of a website. I've been given a color that works well, but I have to give it a flyby state and I'm just looking for the right combination.

What does everyone use to get a nice color combination?

See the attached image. Can any one suggest a color for flyby?

Thank you

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