Here's this week's challenge entry. The rules were:
"Paint this image using only burnt sienna, ultramarine blue and titanium white. That's it. No other colors. With that combo you can have it look pretty darn close to a full color painting by achieving a wide array of values and temperatures."
Here's my version. Not loving how it turned out but it was a fun exercise. Check out the other paintings to see how each artist interpreted a pretty straightforward photo.
8x8 Oil on Canvas
That was a looong time ago. I just googled and not only is Boise Cascade still around but they have the same logo that they had in the 70's.