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Understanding colouring to exact values

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I know this must be simple but I just don't see how to do it.

I have some black on transparent drawings that I need to convert to a specific colour (it happens to be rgb 235, 207, 0 = cmyk 8, 19, 100, 0; = hsl 53,100,46) on transparent. 

1) In AP I click ctrl i to turn the drawing from black on transparent to white on transparent
2) Click Layers > New Adjustment Layer > Recolour.  This gives the HSL option only.  
3) I can set H and S to the exact values but L starts off at 0.  My guess is that I need to be 46% of total 200% range, i.e.-8%.

Unfortunately that colour is much too light and I'm sure there must be a neater method that doesn't need arithmetic.

On the web, there are a lot of tutorials where the starting point is to carefully select precise areas and then paint in a colour.  My starting points aren't photos with lots of gradation, they have already been processed into lines of absolute black on absolute transparent and I want to change the black to another precise colour.

Any help would be appreciated.  







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