To use a dynamic title simply enter any hex color code along with your title into any widgets "Dynamic Title" field in the widget admin area as shown:
Examples:
#F0F0F0 Hot
#FF0032 Find
#030303 Info
#000000 Popular
You must enter the suffix exactly as shown with a space after the color and no dashes.
For the default background image, use "none" in place of the color, or just use a single space before the word.