Color selected words in a textbox

How do I color, also whit an extension, determinated words in a textbox?
For example in a this text:

Lorem ipsum dolor sit amet, consectetur adipiscing elit

it color ipsum --> yellow
sit --> green

Please clear you want this in textbox or label?

I want use a Textbox

What do you want to achieve?
What is the use case?
I only know that you can do html formatting in label.

not possible in textbox out of concept even in html