Overlay Edit Multicolor 3D Elements

Once you've added the overlay edit background file to your composition, you can change the colour of the elements as well as other visual properties by adding effects to the layer. You can adjust the hue to change it's colour via the 'hue, saturation and lightness' effect found in the AE effect panel.

You should also add filters or LUTs your overlay layers. To do so, search for 'LUT" in the effects panel and drag and drop the LUT effect onto your layer.
Select the type of LUT you'd like to import and further adjust the settings as desired.

If you want to keep the viewer's focus on the main subject of your video, adjust the opacity or key parts of the overlay to decrease the visibility. This will help to enhance the viewer's attention on other foreground elements in your scene (if 3D).