Mixing warm and cold colours in arts makes a MAJOR difference in portraying the feel of an art.
Warm reminds us of the summer and heat. It is said to advance or appear more active in a painting.
Colours: reds, pinks, oranges, and yellows
Cold reminds us a chilly winter. These colors tend to recede.
Colours: purples, (violets), blues, greens and green-yellows
Mixing Hot and Cold
Since hot is the opposite of cold, if you're able to mix it well you're an expert! Many may fail to do so.
Here are some examples of the arts: