Review,
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1:ATC border needs fix, you need to make the sides black instead of the color of the icon. (Put passive border than the ATC border on) (HALF DONE)
2:Looks good but the detail of the so called "eye" isn't good, because its just a golden circle.(NOT USED)
3:Backround looks good at the moment.(ALREADY DONE)
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(All my recommendations to your icon, you can use these or not your choice)
Army-of-pandas