hair color chart redken

Is there a comparison chart for Redken and Wella Koleston colors?

I had my hair colored at a salon in NY that uses Wella Koleston products. However, the salons near my home all use Redken products and thus far have not been able to duplicate my Wella Koleston color. Is there a conversion chart – something like “if you used Wella Koleston Color A, then use Redken Color Z”?

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Redken Covor Fusion Low Ammonia 100% Coverage Color Cream Hair Coloring Products Buy Redken Hair Color Permanent - Redken Covor Fusion Low Ammonia 100% Coverage Color Cream 4NN Natural/Natural...

Redken Cover Fusion Hair Color - 6NN $12.00 Redken Cover Fusion Hair Color Redken's new technological breakthrough in hair color. 100% coverage with natural, modern reflects Provides superior coverage for hair thati s most over 50% gray Low odor, low ammonia experience Delivers superior conditioning with rice protein and cationic conditioning polymers Protects aging hair with argan oil which is rich in antioxidants known to neutralize free ...