Description:

• Describe your suggestion with as many details as possible.

Make the machine upgrades, the ones that have 2-4 arrows on them be color-based, (Example: T1-2 would be blue, as the T2 machines are usually blue, then purple, then red.)

Reason:

• Why do you think your suggestion should be added?

It would look far prettier, and I'm willing to create a PR for it too.

Solved by #292