How do I create coloured lighting?

I have created a spotlight using the two layers and 'Destination Out' blending mode. However, I have noticed it cannot support different coloured lights. My idea is that my character will be able to run through a corridor on alert, and the red warning lights will illuminate him with a sharp, dark red light. Is there a way Construct 2 can produce this kind of effect?

I am sure that there is. Did you try using a colored gradient sprite for your 'light'? The example that you are mentioning uses a white gradient sprite.

More layers I guess. I'd recommend using the paster object to help with this. You can draw to them so you can probably draw one color light to one paster and another color light to the other then blend the two together somehow.