colordiff
A wrapper around diff that produces the same output but with pretty syntax highlighting. tldr-pages
On several platforms
Several platforms
A wrapper around diff that produces the same output but with pretty syntax highlighting. Color schemes can be customized.
Compare files
colordiff file1 file2IdentifyOutput in two columns
colordiff -y file1 file2IdentifyIgnore case differences in file contents
colordiff -i file1 file2IdentifyReport when two files are the same
colordiff -s file1 file2IdentifyIgnore whitespace
colordiff -w file1 file2Identify