ok, I know it wasn't realistic to land and walk on the gas giants but you should still be able to land on them.by which I mean by only a sea of liquids. (like Neptune make a sea of ammonia and when you get deeper make a lava ammonia block and at world limit like a solid core.)it will still be interesting but of course the pressure will be very high and you will need a very special suit. last of all when you launch what ever colour (yes I say that even though i'm American... don't juge me ) the gas giant is should be that haze until y is 1200.(like uranus has a teal blue haze until y 1200.)
k I hope this wasn't to long for you and if it was I'm sorry.