A wrapper around
diffthat produces the same output but with pretty syntax highlighting. Color schemes can be customized. More information: https://github.com/kimmel/colordiff.
colordiff {{file1}} {{file2}}
colordiff -y {{file1}} {{file2}}
colordiff -i {{file1}} {{file2}}
colordiff -s {{file1}} {{file2}}
colordiff -w {{file1}} {{file2}}