system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: In computer colors why is it RGB, and not ROB or RPB? What significance does green have that orange and purple do not?

The more that I read my own question the more I can see how RPB is out because there is no yellow. But why not ROB? Orange has yellow in it.
gpt
The three types of color receptor cones in the human eye are most sensitive to red, geen and blue spectum wave lengths respectively. If we had a different visible color spectum it would likely be different.