>>7330903I think anon's advice on colours is really important. If you're going to go simple, you need to have good color theory. Your design is nice and I think you've clearly got talent, but try and experiment with using different contrasts, seemingly odd choices. If you study oil painters, Monet as a typical example, they manage a huge variety of contradictory colors with a kind of grotesque harmony.
Basically, don't be afraid of going beyond the purely binary and good luck. Your style kind of reminds me of those vintage travel posters if they had access to early windows. I'm not sure if that's intentional but it's a nice aesthetic.
