Nothing sad about Emin's initial pale shade (4,4)

'pale shade' is the definition.
'nile blue' can be an answer for 'shade'. I'm unsure of the 'pale' bit.

'nothing sad about emin's initial' is the wordplay.
'nothing' becomes 'nil' (eg nil is zero in football).
'sad' becomes 'blue' (similar in meaning).
'about' is a charade indicator (letters next to each other).
'initial' says to take the initial letters.
The initial letter of 'emins' is 'e'.
'blue' put after 'e' is 'eblue'.
'nil'+'eblue'='NILE BLUE'

Can you help me to learn more?