Note: in AM, use 'off-color'
1.
If you say that you are feeling off-colour , you mean that you are slightly ill. ( BRIT )
For three weeks Maurice felt off-colour but did not have any dramatic symptoms.
= out of sorts
ADJ : v-link ADJ
2.
If you say that someone’s performance is off-colour , you mean that they are not performing as well as they usually do. ( BRIT JOURNALISM )
Milan looked off-colour but eventually took the lead in the 82nd minute.
ADJ