Above you see that a room that has grey as a basic colour just comes alive with some touches of colours. By choosing colours in the same colour range (orange, reds, pinks, lilacs) it gives it a chic and warm look. What's easy about this is that you can easily change the cushions into some purple and blue toned cushions and the room will have an entirely different look, more cool.
You can also keep the basic all white and add little pops of colours with for example colourful furniture, like the chaires in the left image above. Or choose colourful artwork and some cushions (cushions are the BEST home accessories ever!)
Choosing one area of your house to display your collection of colourful vases can also do the trick. That way you keep te rest of the house more neutral.
This is a great idea especially for a work space/home office. And you can change the images around, replace them with new ones when you get tired of them.