The Zen subtheme CTI_Flex comes with four color presets, called black, blue, red, and teal.

I like this theme, but one of our clients wanted a different color
scheme to match the colors of their new building (green and orange). I
was able to create a new "colorway" for this theme with just a little
tweaking of images and templates. You can see this green/orange colorway
in action at: http://midtownanimalclinic.com

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