Replacing icons not working

Question

Whenever I try to replace the icon on the external hard drive using time machine, it shows the icon for the photo file instead of the actual photo:
But I want it to show this photo as an icon:
Any ideas?

Answer 1

When you use the Hue/Saturation adjustment layer, activate the hand symbol with the arrows going left and right and click on the part of the image you want to change the color of. This will select the color channel that needs changing.  In the case of your TV screenshot, Cyans will be selected. Moving the hue slider to the right will make the cyans in your image less greenish.
If you know the exact RGB values of the color blue you want, you should be able to input them in the Replace Color dialogue by clicking on the Result swatch and entering the values. However, the success of using that dialogue depends on how accurately you are able to select the color you want to change. The quality of the screenshot I was able to make from your post was quite poor so it was difficult to get an accurate selection of the area you want to change the color of by using the fuzziness slider.
Another possibility would be to make a selection of the area you want to change (e.g. using the pen tool) and fill the selection with the color you want. If you have a swatch of the blue you want, you only have to make it your foreground color and fill the selection via Edit - Fill - Foreground color