I think I read about their ‘data driven’ decision on the colour of links. https://www.theguardian.com/technology/2014/feb/05/why-google-engineers-designers htt

I think I read about their ‘data driven’ decision on the colour of links. https://www.theguardian.com/technology/2014/feb/05/why-google-engineers-designers https://www.theguardian.com/technology/2014/feb/05/why-googl... The problem with this sort of decision making is it ignores context and is liable to optimise one metric under study at the expense of other more important things (like user trust and retention). It also tends to bias towards easily measured small changes measured in isolation so it encourages blind decisions made without context or coordination. For example a certain colour might mislead users into clicking more by making a link look like the purple default visited link colour. It makes clicks go up but may not increase user satisfaction.