It is an orange/red. It really is up to you, it's most important if you like it. I will say in my opinion, villagers are way more important, also most people plant all types of fruit by the time they are done, so you will end up all different fruit. Anyway good luck, just go for what you want, it's your island.
There is something negative to say about all the airport colors, depending on who is looking at it.
If you like the rest of your island, keep it! Besides, we may be able to change the building color or style in the future. But if it really bothers you, resetting is an option as well. Do you know what color you'd want?
I know it can be easy to be influenced by friends, but the fun thing about animal crossing games is that every person's town is going to be unique. If your friend doesn't like the red airport, that's fine, they don't have to have the red airport in THEIR town. But what do you like? what do you want in YOUR town? That's what you should be considering