CMYK-RGB conversion using ISO Coated v2 300% (ECI)

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Proposal

Create a mapping list for easy look-up and import into a database. Use steps of 5 for CMYK. For CMY use 0 to 100, i.e. 21*21*21 = 9261 variations. For K use 0 to 20, which covers all but one case in the lists at VBB public transport colors. That is 46305 variations.

Comparing two data sources

C M Y K 1 2 1 2
0 0 0 0 fefefe  
100 0 0 0 00a2d3 00A3D3    
0 100 0 0 e00885  
100 100 0 0 3a2996  
0 0 100 0 fae014 FBE116    
100 0 100 0 00a659 00A759    
0 100 100 0 bf1f10 DC2A1B    
100 100 100 0 20211e  
0 0 0 100 131413