To make a shape fade from one color to the next, follow these simple steps:
- Once your shape is created on your first keyframe, copy it over to another frame at the end of the duration of your color fade effect. Remember: do not make this into a symbol. Your tween will not work if you do.
- On your second keyframe, select the fill, and then change the color in the color mixer to the desired shade.
- Select the range of frames from your first to your last keyframes.
- On the Tween dropdown menu in the Properties panel at the bottom of the screen, select "Shape".