This Emacs package provides a minor mode which configures Magit to use delta when displaying diffs.
First, install delta (โฅ 0.0.18).
Next, you need recent versions of both Magit and xterm-color:
M-x package-delete magit
M-x-package-install magit
M-x package-delete xterm-color
M-x-package-install xterm-color
Then load magit-delta.el
from this repo and use:
M-x magit-delta-mode