Color difference has a lot of different formulas that quantify the color difference in various ways, but the most common one is ∆E2000

1. Start with ∆E 2000 - that is the most common solution today - or different formula if your industry already recommends any other.  Be sure not to expect tightened tolerances that the production process can offer! Consult the following table that shows some realistic ∆E values that reflect today's technology limits. Use Spot Variator to generate PDF files - we recommend using 16-bit Lab space. Starting with ∆E= 5 using 1∆E step and +/-2 range created PDF will offer 3, 4, 5, 6, and 7 ∆E pages. That is a good starting point.
   
   
2. Be sure to Calibrate and Profile your monitor with Display Inspector - check if samples that you are working on are in the Monitor Gamut. Open your PDF on calibrated and verified Display using Adobe Acrobat Pro (learn how you can read exact values from the screen)
   
   
3.  With Spot Variator, you have to accept or reject all 43  spot variants (segments) on each page - no way to accept a portion of the page - that is how the ∆E formula works. Select the page with all segments with higher value - this is your tolerance!
   
   

Learn about other than ∆E2000 color difference formulas.

Learn about realistic ∆E expectations

No accepted? Some of the segments only are out of tolerance...?

Try Snowflake

Print SnowFlake and try to find the widest acceptable ranges for each axis independently. Learn more about Snowflake tolerance here.