How do i disable colouring on matched patterns when using grep?

[hawksbill]

Man page for grep: https://www.lightnetics.com/post/3317

Normally grep will out the matched pattern in colour if you do not want the colour output, you can run the following command:

The search string here is block.

$ grep --color=never block  grepfile
This is the first block
This is the second block
This is the third block