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Change skin tones using CMYK numbers #1
Patrick Vijgeboom's picture
by Patrick Vijgeboom
April 4, 2012 - 11:39am

Hello,

I have learn that a great starting point for a white skin tone should be:
M and Y are the same, with a little higher percentage of yellow. C is 1/5 to 1/3 the amount of the Y and M numbers. K = 0.

For example: C=8, M=30, Y=32, K=0

My questions is how to use this starting point in Aperture. Hope anyone can help me with this.

PhotoJoseph's picture
by PhotoJoseph
April 4, 2012 - 6:12pm

Patrick,

You can change the Color Value readout to CMYK, if that helps: [screenshot]

@PhotoJoseph
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Patrick Vijgeboom's picture
by Patrick Vijgeboom
April 4, 2012 - 7:12pm

Hi Joseph,

But you can’t see the values while editing the color channels in curves or values, or can I?
This makes it difficult for me to edit to curve to get a specific RGB value.

PhotoJoseph's picture
by PhotoJoseph
April 4, 2012 - 7:19pm

Patrick,

Right, you can’t see CMYK in Curves. Of course your’e not working on a CMYK image, so that’d be why.

I suppose you could take a known good image (or a variety of) done the way you’re used to, bring them into Aperture in RGB and check the values, to see if you can get an average starting point for RGB like you have for CMYK.

-Joseph

@PhotoJoseph
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Patrick Vijgeboom's picture
by Patrick Vijgeboom
April 4, 2012 - 7:25pm

Okay I will try that. But even with RGB, I can’t see the value change while editing the curves. With other words, I wish I could see the RGB values in the curves to.

gfsymon's picture
by gfsymon
April 5, 2012 - 9:57am

Yes you can see the values in CMYK … or several other ways. But it’s not obvious how. Also … you may find a bug in Aperture3, where the values in the Lupe aren’t updated unless you move the Lupe.

Screen-Grabs :

Grab-Lupe Drop Down

Grab-Adjusments Drop Down

David  Moore's picture
by David Moore
April 5, 2012 - 8:34pm

Hi all

I use that cmyk guide also but as a guide. You have lots of wiggle room in that formula.
Enjoyed the book on Skin color…The guy who wrote it has videos on Lynda.com . Sorry forgot his name… Vargus? I gave the book to a friend and never got it back.

davidbmoore@mac.com
Twitter= @davidbmoore
Scottsdale AZ

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