I've also decided to divide the white background blocks further: into those with warm colors included and those that are more just cool colors. It seems to me that northern Europeans tend to prefer warmer colors--maybe to offset the cool grey skies?
I'm planning to finish this one for a Hamburg friend (one of those cool blondes who like warm colors). Many of the blocks in the photo above are Luisa's, which I think she's shown on her blog, but I'll take a picture of her latest ones together. As always, they were lovely, and with inspiringly perfect workmanship.