I know DT is quite expensive but it will mix & blend with itself. Not so sure other stuff can due to the secret herbs & spices nature of the DT recipe.
Alcohol or oil based products that wash off in turps might blend but means plenty of experimentation will be required.
Personally, i would recommend buying another DT colour to mix in with your existing Coolangatta Gold as that way you know it will be compatible.
Cheers Waz

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