***STORY RELATED: Cannot be missed***
Once you've hopped the giant blue gate and unlocked the "Robbed" achievement, you'll now be in this area in which you cannot progress until you paint yourself blue to bypass the scanners near the exit point.
Use your pickaxe to destroy the block on top of the button, as well as hit the tree with the blue leaves that's directly above the entryway of the paint tub to turn the paint pipe blue.
Then, as the red man is running back and forth, use your purple beam between two stumps to block him from running past the button. Instead, he'll run into your beam and onto the button, allowing you to stand on the paint table and turn yourself blue. This will then allow you to bypass the blue scanners and access the next section, unlocking the achievement as you enter the Blue Ville!