Needle chucking Ninja
so whatever transparent you use over black, you won't cover it, black will still be visible. But does that black become more dirty,muddy,less vibrant?Think basic, what colours do you add to create a colour? With transparents you can use that theory to ‘shift’ a base colour on the substrate : yellow & blue will give a green shift, blue and red will give purple shift.
I use scrap paper and empty my brush on it, then I have a starting point to overlay other colours onto for different colours.