Update colours

[Turbotailz]

The site is using default colour scheme provided by the Astro template.

Need to go through and update the theme with Syscraft brand colours.

[NotGeri]

I couldn't find anything on colours but just using the one from the Discord banner doesn't look too horrible:

Although even the current theme is pretty readable and solid IMO.

[Turbotailz]

Yeah I was meant to update this issue with the proper brand colours 😅