Transparency loss when setting working colors from Rust

[TrueDoctor]

When setting the working colors from the rust code, the colors are set to 100% opacity.
To reproduce:
Set a transparent color in the color picker and then press shift + x to swap the colors.
@akshay1992kalbhor has indicated interest in working on this.

[Keavon]

@akshay1992kalbhor if you'd like to work on this, just let us know. (GitHub requires you comment in the thread before we can assign the issue to you.)

[akshay1992kalbhor]

Yes i want to. Will start in a couple of hours

[Keavon]

Awesome, glad to hear it! Please reach out if you're at all stuck or confused. I assigned you the issue and set it to In-Progress. If you end up not starting on the issue soon, please comment and I can remove the In-Progress label so its status is more clear.

[Keavon]

Closed by #212