Are characters in colour? Look at them again! (2-4)

'look at them again' is the definition.
I can't tell whether this defines the answer.

'are characters in colour?' is the wordplay.
'characters' indicates an anagram.
'in' indicates putting letters inside.
'colour?' becomes 'red' (red is a kind of colour).
'are' is an anagram of 'rea'.
'rea' put within 'red' is 'RE-READ'.

Can you help me to learn more?