Safety First! You are better off without it if you are using up all the free space in the room. Your kitchen should be spacious and you should never feel restricted in your movement - in fact it can be dangerous if you are. Yes, a kitchen island is good to have, but not if your safety and freedom of movement are compromised to accommodate it.
Regarding colors and designs, kitchen islands can be made from a number of different materials. The framework is usually wood, but the main visible surfaces could be metal or even stone - granite is a popular substance used for counter tops. Stainless steel is also good, but try to avoid aluminum if possible, because that is very soft and easily cut and scratched, and the metal oxidizes to a dull finish.
For example, we have seen islands of concrete when the rest of the kitchen countertop is made of granite or another material. We have seen a black island used as a nice "dividing wall" to keep the kids away from a white kitchen.
The next thing to focus on is the materials you'll need, which include everything else aside from the measurements. Plumbing and electricity should be covered properly before you proceed to decorate your kitchen. The kitchen island design's main purpose is to make the kitchen a wonderful place for family gathering. With this in mind, you can choose the appropriate furniture, appliances, and accessories.
ikea kitchen island on casters
ikea kitchen island with stools
ikea kitchen island attach to floor