There’s an ongoing debate about how humans perceive colours. Some say that nobody sees the exact same colours as someone else, but that by perpetuating what we’ve been taught by our parents or grandparents we’ve just somehow managed to reach somewhat of a common ground. So, in theory, green looks the same to everyone because we’ve been told it’s the colour of plants in spring and summer and blue is also safe, because it’s the colour of the sky during midday. Still, the way we categorize shades of the same colour is still a topic that is always open for debate and can sometimes lead to lengthy and heated arguments. (topdesignmag.com)