Hey Greg - I am thinking that yellow or pale yellow should win out - in the Dwarf project, Golden Dwarf Champion (pale yellow) X Green Giant (green) gave medium yellow F1 fruit.
By the way, I suspect that White Currant could be Coyote, a variety I introduced through the SSE in the early 90s and misnamed it Ivory Currant prior to knowing the actual name (which I found out the following year) - unfortunately, the old name persists here and there. It isn't a big jump to go from Ivory to White Currant - I am not absolutely positive, but it is possible. They are quite tiny tomatoes that are nearly white on the blossom end, shading to pale yellow at the shoulders - and nearly translucent.
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Craig
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