What Photoshop fill for 18% grey card?

Started Dec 16, 2005 | Discussions thread
Iliah Borg Forum Pro • Posts: 27,755
Re: It's sad when "Xrite" tells you....

Petruska wrote:

What is Y100?

Y100 is Y coordinate of XYZ normalized to 100%,

see http://brucelindbloom.com/ColorCalculator.html

enter Lab values (for 18%: 49.4961, 0, 0)

check "scale XYZ"

press "Lab" button to calculate XYZ

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