Thanks for the specific advice on improving the colours & contrast. I've uploaded an alternate version with much better contrast and less saturation. I didn't realize just how saturated and orangey-brown the first version was.
New version: http://www.richardsonmedia.ca/site_v1b.html
Old version: http://www.richardsonmedia.ca/site_v1.html
I'll continue to refine it and add some more visual interest (graphically or with the addition of another colour). Rather than having a transparent border, around the blocks, I may change it to a third colour.
Any further advice/critique is more than welcome.
Thanks again!