Ornamental tomatoes? How about Snow Fairy, Variegated, and Stick? Also consider multiflora tomatoes, blue tomatoes, striped tomatoes (such as those from Wild Boar Farms), etc. I like the hue of Medovaya Kaplya's leaves. Some tomatoes have chartreuse leaves (e.g. Cherokee Tiger Black Pear). Micro tomatoes like Red Robin should work well with flowers.
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