Structure to store the state of a color transition on a Selectable.
| defaultColorBlock | Simple getter for the default ColorBlock. | 
| colorMultiplier | Multiplier applied to colors (allows brightening greater then base color). | 
| disabledColor | Disabled Color. | 
| fadeDuration | How long a color transition should take. | 
| highlightedColor | Highlighted Color. | 
| normalColor | Normal Color. | 
| pressedColor | Pressed Color. |