I just did a quick comparison on copy paper and my first answer is that it's not the same for each color. For the Blendability marker that best matches the SU color, it looks like Old Olive medium, Coastal Cabana medium (and the CC dark is a good match to Bermuda Bay), Pumpkin Pie medium, Daffodil Delight light, Cherry Cobbler dark.
Will have to try on Whisper White instead of copy paper tomorrow and will let you know if I get different results.
Sharon
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