filling in colors to Letters like "O"

[Aditya Kumar]

how can fill in colors to letters like O etc
I have written something in text form in a simple font
now I just need to fill some colors to the spaces inside the letter O how can that be done
I need a good clarity and perfection so that colors are filled in neatly

 

[hawkeye]

Ctrl click the text layer to select the text. Invert the selection, and add a new layer. Use the brush tool on the new layer to paint in the open areas.