My personal Alfred theme, which takes a smidge of inspiration from Raycast and uses Berkeley Mono.
Note
If you’d like a free alternative to Berkeley Mono, you might consider Server Mono or iA Writer Mono!
I might need to tinker with the contrast to satisfy my old eyes, but so far I’m pretty happy with it.
Clone or download this repository, then double-click the .alfredappearance variant you want to import to Alfred’s Appearance section.
If you alternate between dark and light OS-level settings, select the light theme when you’re in light mode and the dark theme again when you’re in dark mode and Alfred will change between them automatically.