04-mar-2020 update
The bug with the positioning of controls inside components has now be fixed by the Power Apps Team (great job there!). This means that now you will no longer have any problem importing the color picker component inside your applications: every controls inside should fit right in place and the component should exactly have the look it has in the capture below when adding it to your screens.
________________________________________________________________
Here is my latest Power Apps component: a highly customizable color picker component.

You will find all related instructions right here: UltimateColorPicker on GitHub
If you like it, please consider giving it a thumbs up!
If you have suggestions or if you find any issues, please do not hesitate to post them on GitHub (see link above).
Hope you'll enjoy it!
Emmanuel (Twitter: @R3dKap)