Hello all, a new subscriber here, and sorry if this has been discussed before. In that case please direct me to the proper sources and disregard this post.
 
If not, then I have an application like this:
 
Suppose container A is filled with liquid pigment BROWN (with a certain LAB color value, taken from an RGB camera)
I have now container B, filled with liquid pigment light-reddish-brown color (with a certain LAB color value, different from that of pigment BROWN above)
 
Now, how can I:
Add and mix three (CMY) colors into container B, with the intention that the resulting LAB value is the same as that of pigment BROWN in container A above.
 
How can I calculate how much CMY I must add into B?
 
Where can I find the right algorithm?
 
Thank you so much for your help.
 
Regards,
Ted.

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