Update Fleet color theme

[OljaKli]

Hello,

We’ve noticed that the color theme for Fleet is outdated. Could you please update it following the instructions provided in the links below?

Building Custom Theme Plugins
Modifying Theme Settings
Please ensure that you are not using any of the old, edited themes as a reference. Kindly delete the old theme from the folder and create a new one using the latest version of Fleet.

Thank you.