Fabric is definitely one of the easiest ways to bring in color and pattern into a space with bar stools. (Spaces that, typically, may be short on both of those design aspects.) Fabric bar stools tend to be comfortable and pretty, although probably the hardest to clean.
Speaking of which, the Tolix stool known as a Tabouret can definitely add some charm to pretty much any bar or counter. It was originally designed for exterior use but its versatility allowed it to make its way inside the house.
In some cases, the color palette sets certain ground rules. Like this contemporary kitchen that’s mostly white with a few black and gray-beige accents. The black bar stools are the excellent addition to the décor, making everything else come together wonderfully.
Another good example of simple design that fit in a variety of interior designs is that featured by Stool_One by Magis. Here you can see it displayed in a contemporary setting where it complements a large kitchen island.