To customize SmartTab's colors, simply follow these step by step instructions:
Step 1: Make a shortcut
Use your right mouse button to drag&drop SmartTab.exe somewhere, and choose 'Create Shortcut Here' from the ensuring menu.
Step 2: Change the shortcut's properties
Rightclick your shortcut and select 'Properties'. Switch to the 'Shortcut'
Your screen should look like this:
Step 3: Change the target to include the colors
Add quotes to the value in 'Target', so that, for example,
D:\backups\SmartTab.exe becomes "D:\backups\SmartTab.exe" (use your own value!).
Then append " -background=FF8405 -foreground=FFC846 -shadow=000000 -highlight=000000 -font=683702" (without the ") to it.
That'll turn SmartTab Couhgdrop Orange (see Premade Colorshemes). You can adjust the colors any way you like - if you'd like a list of colors and their codes, visit Webmonkey (don't forget to remove the '#' when copying these color codes).
Step 4: Hit Ok
Hit 'Ok' - there's nothing more to it.
Step 5: Start SmartTab
Start SmartTab by doubleclicking your shortcut. Now SmartTab should have the new colors. You don't need to kill of any running SmartTab - it always replaces a running instance with the new one, allowing you to quickly experiment with the colors.