All I want is a decent pair of pants.
There can be no guesswork on behalf of the user to ascertain what they can interact with. It’s a broken experience if trial-and-error is the means by which a person engages with a site.
This is why we need to usability test at the skeletal and visual design-applied phases: color introduces variables and associations that wireframe / placement-based testing cannot address.
Color has a gravity in design that can’t be trivailized. When employed without solid thought toward (user) impact, its usage can break an experience in its entirety.