As a senior designer who, for the last 10+ years worked on so many software products I can tell you this: none of these things are applicable for 99.99% of busi

As a senior designer who, for the last 10+ years worked on so many software products I can tell you this: none of these things are applicable for 99.99% of businesses. Google did some a/b testing on which blue tone links converts better. Because, they are Google and .0001% improvement can be significant. But, even tough I was spoonfed the same theory in Design School, really, the practicality of it is negligible.