Learning the Adobe Illustrator Part 11

I was planning on making some time of military patch, but it ended up looking like this instead. No chevrons. Just a wave/arc on top. Was not sure about what to place below that so I placed three of the same shapes and overlapped them. Perhaps the image can be compared to some space or sci-fi patch?

The colors left me kinda puzzled. I googled the nearest mixing colors to grey and got shades of blue, black, red. The light blue kinda looks off, but I am not sure why.