To find the hint in this level you need to move the large green potted plant away from the cell bar. This will reveal the alphabets RGB. Now count the books on the shelf according to their colour:
Red= 3, Green=3 and Blue=8
Now count the number potted plants according to their colour:
Red=1, Green=2 and Blue=1
Now add these numbers and and input them according to the RGB order.
So 3+1=4,3+2=5 and 8+1=9. Press the keypad and enter 459 and press OK. Now you can proceed to the next level.
