"Hello,For me, Simplicity is using the least number elements that can accomplish the goal from design...for example: If I want a web page section that reflects luxury..I look at the very basic elements that can make this feeling...and in this case it's the outline of font...a photograph of a royal person can make it better and higher but it's not need as I already accomplished the goal of design.Another example is this camera, the goal is taking a good picture, all you need is a lens and a button...a screen would make it better and more precise, but not needed to reach the goal.Another thing is realization simplicity which is a little advanced and used with gestalt principles for grouping, grouping elements in a group with not more than 3 items makes it easier for human mind to realize and remove the chaos feeling. that pretty much close to the common concept of using only 3 colors in the design.Thanks for your time,Best Regards,Shaltot"