Thanks, Don.  The .jpg doesn't really do the sky justice - the clouds are actually more pink than they appear in the .jpg and the painting is a bit prettier in person.
I'll get the colors you suggest and give them a try.  I've got thalo blue in my acrylic craft paints, haven't added it to my watercolor palette as yet.
Sharon

I painted this at Fort Foster, Kittery Point, ME in late August, 2003.  The lighthouse is in Portsmouth Harbor, 1/2 way between ME and NH and is fairly distant from the Fort.  I'm basically happy with the piece, but think it could use a bit more DRAMA.  
Color palette was Cobalt blue, Alizarin Crimson, Naples yellow, CAD yellow, Hooker's Green, and Neutral, possibly Burnt Sienna, as well.
This was a bright, hot, breezy afternoon - I don't, as yet, have an umbrella to shade my easel and there were no trees to provide shade.  Getting accurate color values was tricky.
Suggestions?