Hi Roman,
Paint and coloring (and color palette) features are on our roadmap and will come in version 5.1, which is a free update from v5.0 licensholders.
This means you are not able to color using the current free pre-release (Alpha 8). However, you can easily export your animation using one of several ways – to get your animation into any paint program you might have already or any free one.
Let me know if you want me to go into more detail about exporting.
Best,
Niels