This is possibly a pretty and interesting article, but the author does forget that about 4% (8% men, 0,5% women) of the human population suffer from daltonism. So yeah, we like our colours to be clearly separated.
Having linear gradients of colours leads to the impossibility of distinguishing the data categories, so nop. If you do this you MUST also provide another kind of representation, like ColorAdd http://www.coloradd.net/ .
Having linear gradients of colours leads to the impossibility of distinguishing the data categories, so nop. If you do this you MUST also provide another kind of representation, like ColorAdd http://www.coloradd.net/ .