EnquireI suppose I shall have to remember to add a keyword for the variant spelling 'color'.
Here's an example where concrete narrative matters less. My driver here was to simply make the most of the building's undulation. I think the image still has narrative, but one that is not so bound to the creator of the image than is oft times the case. BUILD IT AND THEY WILL COME. Make your own story...
I used my widest of lenses at an effective 25mm - which has a warping effect anyway; perfect for undulations. Then in post I turned the whole shot black and white, taking a colour selection from the original as an overlay. The selection had to be quite precise, or is that imprecise? There's a lot of diffusion caused by all of the glass so a sharp-edged selection would show up in an extremely ugly fashion. Fortunately the vivid blues in this case are well seperated from other colours in the image. It is typically extremely difficult to colour select such a diffuse source.
It also helps to change the blending mode of the colour selected layer with the new black & white layer from the default (or 'normal' as photoshop calls it) to 'colour blend'.
Here's what the colour selected layer looks like:
