Is it dark or light?
Day or night?
Gloomy or clear?
White and black are not really colours. White is the light and black the lack of light. We use them to create contrast.
White is often associated with purity, virginity and peace. Black with darkness, mysterious, mourning and dead.
Everyone has their own association with colour.
Black does not have to be negative. It is the meaning that you give to the thought.
And ultimately we want to find balance.
What does your painting look like if you only use black and white?
What emotion is behind it?