Ghostty will now auto-generate a full, cohesive 256-color theme from just the base 16-color palette. This makes it significantly easier to make custom themes that are beautiful (just define 16 colors). See the demo below showing multiple themes fully generated.

Thanks to Jake Stewart who contributed this to Ghostty and made a nice write-up explaining the background and approach: https://gist.github.com/jake-stewart/0a8ea46159a7da2c808e5be2177e1783