Gaudiness
/ˈɡɔːdinəs/
Definition 1 of 1
Pro Tip 1/3Negative Connotation
Gaudiness often implies a lack of taste or refinement. Used to criticize excessive showiness. 
The gaudiness of the neon signs made the historic street look cheap.
Pro Tip 2/3Visual Overload
Describes something that is visually overwhelming and can be almost painful to look at. 
The room was a mishmash of patterns and colors, its gaudiness giving me a headache.
Pro Tip 3/3Attention Grabbing
Gaudiness grabs people's attention, but not always in a good way. It can be seen as desperate or vulgar. 
His gaudy attire screamed for attention at the somber event.