Creating an L*a*b* swatch does not maintain L*a*b* values.
Creating an Lab* swatch does not maintain Lab* values.
Colors swatches are converted document color mode, Illustrator’s supported document color modes are RGB and CMYK. Please try the suggestion provided by Ton.
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Andreas, there is a request to support more decimal spaces here:
http://illustrator.uservoice.com/forums/333657/suggestions/46118086
Please upvote it. -
Andreas Föhl commented
Taking a CMYK-Color, contert it to Lab, later convert it back to CMYK and you get messed up values! InDesign is able to cope this since 2019 with 3 decimals and it works fine. Illustrator only supports spot-color-books with two decimals
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Ton commented
Converts the Color Type to Spot and changes Lab Color Mode to the Document color mode.