How to Edit the Color Theme Options...

Hello,

I have been using (and enjoying) the Showcase theme for a few websites so far. I am now trying to use this theme for a new project, but I am not fond of the other options in the 'Color Scheme'. I like the dark theme, but would really like to modify the red and blue colors for the other color schemes. I have used Photoshop's color picker to find that the two shades of red used in this theme are 'eb2f00' and 'ff4516', but I cannot seem to find these colors referenced anywhere in the CSS files in the theme editor. What files, classes, id's are used to create the color schemes on the back end?

Thanks for your time and consideration.

-YoungMoney