Another strategy is to isolate a BINARY COLOR and SINGLES. In this example, there are only 6 single numbers remaining. You can then add an additional color.

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TX -Key Predict: PS+Single+Purple
PS10
012,013,129,026,269,038,046,047,048,049,137,138,469,135,569,589 (16)
PS9
246,247,256,267,679,014,023,034,123,149,347,348,349,468,268 (15)
PS8
078,178,124,125,126,127,136,169,179,278,279,019,037,039,379,035,036,045 (18)
PS6/7/12
145,345,146,168,237,257,346,236,079 (9)