tail -f myfile.log | perl -pe 's/.*TEXT_TO_FIND.*/\e[1;31m$&\e[0m/g'
\e[1;31m will give you the red color. If you would like some yellow, use \e[1;33m, and for green use \e[1;32m. The \e[0m restores the normal text color.
SOURCE: http://unix.stackexchange.com/questions/8414/how-to-have-tail-f-show-colored-output
(Answer <37>)
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