Purple is a pretty impressive colour after all.
Ethan Scott has been red/green colourblind his entire life but was surprised on his birthday with a set of EnChroma glasses which allowed corrected his vision and allowed him to see the full spectrum of colour for the first time. As you can imagine, it was slightly overwhelming.
We really wish we could have been there when he saw Barney for the first time with the glasses on. His face probably melted.