Two neutral complements can represent a surprising array of hues, depending on your topic. These birds were a paper test, all using Cobalt blue (PB28) and Burnt Sienna (PBr7). That Great Blue Heron looks a bit more like a Tricolor, oops!

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I posted this one earlier, bringing it back now as a good case study for the technique. The sky is all cobalt blue (PB28) and perinone orange (PO62). Add each to wet paper, swirl a bit, stand back and watch the magic!

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