White color is pure, timeless, and elegant. For ages, it has been used for formal or non formal clothing apparel. Having the similarity with black, white will never go out of fashion. It enhances our aesthetic looks as a lady and gives us the fresh and clean appearances all day.  This outfit's color is also really suitable for summer time since white reflect the heat, so we can enjoy our activity under the sun and feel much cooler than wearing the darker one.  White outfit also tends to be more noticeable in the crowd than dark outfit. For example when we wear it in many formal events such as wedding, prom, etc.
It would be very easy for those who want to mix and match their looks using white dress, shirt, or other stuff, as it's suitable to be combined with any other colors.
Like a plain canvas, sometimes we feel like it's too simple for us, but yet we can wear anything catchy like a statement jewelry, outer, or bag to match our white outfit. Other cons of white outfit is it's easy to catch stain such as dirt or food and we need an extra effort to remove it. Also when the cloth gets wet from our sweat or water, it can become transparent and sometimes shows a glimpse of our underwear.