Colour management path

[Iliah Borg]

I'm writing an application to check accuracy of a colour profile (those .icc/.icm things). The application takes Lab values measured from a target directly and compares them to Lab values the profile predicted. I want to show not just a numeric report, but a visual comparison too. To do so, I need to convert Lab numbers to RGB numbers through user monitor profile. The question is - if I do

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set the penColor to r,g,b

is it shown "as is", sending the triplet directly to the screen, or any additional conversion happens on the way?

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Best,
Iliah