I can't seem to work out how to change a color to precisely match another color in Photoshop. I've read a number of books and the only advice I've found is to use the Photoshop Hue/Saturation dialog box and manually fiddle around with the sliders. Sometimes this works OK, but often I can't get a usable result. You can see in the picture an example of the problem. I'm trying to change the green fabric to match the color of the yellow on the left. The best result I can get is not the right shade of yellow and still shows traces of the green. I've also tried Match Color and Replace Color with similar lack of success.

Even if I could somehow get it to work this seems like a very time consuming way if you had many colors you needed to match. Is there some plugin or something that will automate this type of color changing in a more precise way?

If not does anyone know of an online tutorial that might help? Any other advice?

The texture in the greenish one is much coarser so identical is as good as impossible (seen from your example). But if you want to eyeball it you can come quite close as follows.

1/ Blow the image up untill you see the pixels and choose with the eyedropper a yellow that is typical for the yellow tissue. I got 246-216-37.
2/ create a new layer and fill it (alt-del on pc) with this colour
3/ set its blend mode to color. That way you change hue and saturation of the green below to match the yellow.
4/ copy this layer for the next step. and have this one activated.
5/the texture is too coarse. Go to channels and click them one by one. The blue (as expected) is way dark. Copy it, the Ctrl click on it to load as a mask. Invert the mask.
6/ set this blend mode to change the lightness of the pic by choosing luminosity blend mode.

feel free to tweak the mask a bit if needed.

as said: not exact, but it shows a possible way to take

There is mil. ways of matching colors in PS. If you want to use H/S here is the way :)

Its not perfect, but for two min. of matching its good enough ;)

Tihomir

Thanks for the replies. The technique you showed Aeneas is a much better result than using Hue/Saturation.