Via dei Fori Imperiali, Rome
Orange is a combination of yellow and red. Orange is considered a warm color like red, but to a lesser extent; orange expresses energy. It has luminous qualities and has been used for attention-getting purposes, such as on caution signs.
Orange brings up memories of fall leaves, pumpkins and Halloween. It symbolizes balance, warmth, enthusiasm, vibrance, flamboyancy, and is demanding of attention.
Excerpt from Colors and Moods