First we use an escape character so we can actually define a output color. This is done with \033 (\e). Then we open the color statement with [31m. Red in this case.
The “some colored text” will be the text outputted in a different color. And after that we have to close the color statement with \033[0m.
php -r 'echo "\033[31m some colored text \033[0m some white text \n";'
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