Cupola, St. John's Lutheran Church

I haven't painted much in the last month because we've spent so much time with outside activities like baseball and soccer. In the evenings - my usual painting time - I've just been too tired and uninspired to pick up a brush. Finally went back to my easel this past weekend when I spied the cupola of St. John's Lutheran Church in the West Village bathed in a great afternoon light. Can't say I'm entirely happy with the results, particularly since this was a pretty quick pencil and watercolor sketch. And I'm still trying to figure out the best choices for scanning these images . . . color reproduction still isn't as accurate as I'd like. The sky, for example, is a colder blue on the painting itself. Any suggestions?