Although you can’t change the color of the color labels themselves, you can change each color’s name to something that makes more sense to you when you’re sorting your images. For example, if you want change the Green label to read “Keepers,” just press Command-K (PC: Control-K) to go to the Bridge Preferences, click on Labels (along the list on the left side of the dialog), and then delete the word “Green” that appears to the right of the green dot, type “Keepers.” Click OK to close the Preferences dialog. Now, when you look in the Label menu, it will be updated with your new name.