100 Floors Level 91 is a fairly simple walkthrough, all you need to do is follow these steps and you will be on your way to the next level.
Step 1 – Get The Paintbrush


Get the paintbrush from the bottom right corner.
Step 2 – Clean The Area


Use it to clean the area on the right corner of the wall, you can find it right above the section where you acquired the brush from.
Step 3 – Click the Number


Step 3- This will reveal a number, click it, and the squares on the door will become colored.
Step 4 – Match The Color Combination


Step 4- This is what the color combination is supposed to be like-
- Top row: Orange, light blue, blue,
- Bottom row: Green, pink, yellow
Step 5- Door Open


Once this is done you can move on to the next step.
Check out more 100 floors walkthroughs below –
100 Floors Walkthrough (Level 41 – 60)