I am a big proponent of making use of negative space. Simple doesn't have to mean boring or bland. Simplicity means creating visual calm so people can focus on what matters. ⠀⠀⠀⠀⠀⠀⠀⠀⠀
You walk into a living room. The walls are painted yellow. The couch has a yellow floral print. The rug is a yellow shag rug. Chris Hemsworth is sitting on the couch but you don't notice him because you have been blinded by yellow and had to run out of the room.
Now picture this:
You walk into a room. The walls are painted lattice grey, the couch is a light beige colour, the rug is a geometric pattern with shades of white, grey and beige. There are a few yellow accents sprinkled around the room - a candle, a flower pot, maybe a throw blanket or some accent pillows. Chris Hemsworth is there and he hands you a yellow flower.
Now, I bet you would actually consider both rooms a "yellow room" if you had to describe them, but which room allowed you to focus on the details? I can almost guarantee it was the second one!
THAT same principle applies to websites. ⠀⠀⠀⠀⠀⠀⠀⠀⠀
Sometimes less is more, ya know?