100 Doors X - Level 17

Lots to study in this one. RGB refers to red, green and blue, and there are buttons of each on both sides of the door. There are also 1, 2 or 3 bars next to each button. When the buttons are pressed, their colors change, but the bars don't move. What might the bars be trying to tell you?

The quantity of bars is related to the "RGB" at the top of the screen, where R=1, G=2, and B=3. Where there is one bar next to a button, make that button red. Two bars, green, and so on.