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Its Easy to Change Colour in LAB.. No, Really.

Here’s a nice and easy way to change a colour of an object, with no masking (Phew!), but before you get to excited I should warn you, I’ll be heading into the world of LAB.

Don’t panic though, I’m not going to try and explain LAB nor how to use it to it’s full potential. For that I would highly recommend any book by Dan Margulis but if you’re like me and prefer your tutorials in film and on line, Dan has an excellent course on Kelby Training, Here.

So here we go, we have our starting image, and yep, for this I’ve chosen a picture with a good solid block of colour, but the principle would be the same for a more complex image but you may have to use a mask… sorry.

Here’s the starting image;

LAB01

First things first I’m going to go into the LAB mode. Choosing LAB from the Image – Mode menu.

LAB02

Now you may need to have a bit of a play to find the right chanel to play with, it’s going to be either A or B, the L is for lightness so you won’t need that one. In my example I know i need the B channel and using the finger tool on the image I can pinpoint where I need to put an anchor point.

LAB_hand

Dragging down I change the colour and by adding anchor points either side I can change just that colour.

Click To Enlarge

Click To Enlarge

And that’s about it, that’s the tip. All I have to do now is go back to RGB.

Here’s the before and after just to fill in a bit of space.

Before and After in About 30 Seconds

Before and After in About 30 Seconds

More:  Color Correct Mixed Light Sources in Photoshop
About Eric Renno (419 Articles)
Eric’s background in video editing with Adobe Premier led to his interest, and then obsession, with Photoshop. Starting TipSquirrel.com as a hobby he is proud to have gathered together and be a part of The Photoshop Nuts. Known as only “TipSquirrel” for two years, Eric ‘went public’ when he was a finalist in The Next Adobe Photoshop Evangelist competition. He’s also been a finalist in Deke’s Techniques Photoshop Challenge. While still taking on some freelance work, Eric has recently become a Lecturer at Peterborough’s Media and Journalism Centre where he enjoys sharing his knowledge as well as learning new skills. This realisation that he loves to teach has made Eric look at altering his career path.

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