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Changing a colour

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Old 10-08-2012, 04:52 AM
Tony W's Avatar
Tony W Tony W is offline
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Join Date: Mar 2010
Posts: 1,415
Re: Changing a colour

Ricardo the attached may make it easier than an explanation only.

1. Convert image to Lab Color
2. Add a Curves adjustment layer
3. Adjust the a and the b channels to approximate my sample. This will effect the colour only
4. Adjust the L channel to effect overall density and contrast
5. Now you need to bring the background back by using Blend if
6. Either double click the layer or use the drop down to open the Blend if dialogue and adjust the channels as required to bring the background detail back.

To get it just right on your original image may require a little more play with the adjustments and in the case of the white towel the colour fringe around the towel will need to be removed and also IMO you will need to adjust the shadows to match the values of the other white towels
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File Type: jpg 1TowelChange.jpg (100.9 KB, 46 views)
File Type: jpg 2TowelChange.jpg (98.3 KB, 36 views)
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Old 10-08-2012, 02:43 PM
Flotsam2 Flotsam2 is offline
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Join Date: Jun 2011
Location: Diamond Harbour, New Zealand
Posts: 20
Re: Changing a colour

This is how I would do it.
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File Type: jpg Change-Colour.jpg (97.2 KB, 35 views)
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Old 10-08-2012, 03:33 PM
jklier jklier is offline
Join Date: Feb 2010
Location: NYC
Posts: 32
Re: Changing a colour

There haven bee quite a few helpful techniques posted here. Which one fits your needs depends a bit on your workflow, and your specific needs. Do you just need to change the feel of the image, or do you need to match an exact palette? How realistic does your new color have to be? Do you need to remain in a specific color space, or can you play?

Lab color space is very cool. But working with it can bring some limitations along (some photoshop tools don't work in Lab - you can convert back and forth, but that's not ideal).

Some of these methods get you in the ball park very quick, but may not be as consistent if you have to shoot a whole series, or if you have to match existing products. Since time is money, if all you need to do is remove a distracting color from the composition, but beyond that the object is not the purpose of the shot, the quicker methods are definitely called for. If you have to replace the colors of a hero object, different story.

I have had catalog shoots where the client didn't have samples in every color/sku combination; or where after the shoot something was found off with one of the samples. Color replacement can help out in those cases, but it has to be spot on accurate.
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Old 10-08-2012, 07:54 PM
Brandon McCann Brandon McCann is offline
Join Date: Feb 2011
Location: Tx
Posts: 38
Re: Changing a colour

Personally, I would just add a hue/sat layer set to colorize. Then maybe manipulate it with a blank layer at low opacity or an overlay layer, maybe a soft light layer as well.
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