Inapt colour? (5)

I believe the answer is:

paint

I'm a little stuck... Click here to teach me more about this clue!

'inapt colour?' is the definition.
'paint' can be an answer for 'colour?' (I've seen this before). I am not certain of the 'inapt' bit.

'inapt colour?' is the wordplay.
'colour?' indicates an anagram (I've seen 'coloured' mean this).
'inapt' with letters rearranged gives 'PAINT'.

Can you help me to learn more?

(Other definitions for paint that I've seen before include "Item used by 23 Across" , "Coloured liquid in tins" , "Coloured coating" , "Catch a likeness" , "Use a brush on canvas" .)

I've seen this clue in the Evening Standard.

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