Hi @saj42
Thanks for stopping by! I’ll do my best to help.
The individually addressable LED Strip means each LED on the strip can be controlled individually. There are cut points along each strip so you will be able to cut into 3×1.5m strips (or close to).
WLED (the software on the controller) does allow you to set segments to a specific colour.
If the three strips you want will be close to each other, you could wire them together after cutting. You would either need to solder them or find connectors on Amazon / AliExpress.
If you are not comfortable with that method, you could buy additional controllers for each strip