I use doom emacs. This is my config:
(use-package! flyover
:after flycheck
:config
(setq flyover-use-theme-colors t)
(setq flyover-wrap-messages nil)
(setq flyover-hide-checker-name t)
(setq flyover-levels '(error warning))
(setq flyover-background-lightness 35)
(setq flyover-percent-darker 35)
(setq flyover-text-tint 'lighter)
(setq flyover-text-tint-percent 35)
:hook (flycheck-mode . flyover-mode))
```
I use doom emacs. This is my config: