Editora 0.9.10. Archived, so links from that release keep working. Read the 0.18.3 page →
Theme: Set App Theme…
theme.setAppTheme Pick the application (chrome) color theme.
How to run it
Open the command palette (M-x in the Emacs keymap) and search for Theme: Set App Theme…, then press Enter. It has no default keybinding, but you can bind one in Settings → Keymaps.