feat: customizable liquid colors in PD

[eboyden]

Overview

It would be great to allow the user to pick the liquid color from a menu when using PD. This would not only allow selecting colors that match the physical liquids (where colored liquids are used), but would also allow easy coordinating of liquid colors across multiple related scripts, so that users always know that color 1 = X liquid and color 2 = Y liquid.

Implementation details

No response

Design

No response

Acceptance criteria

No response