It is a path of a point moving in space or the track of a motion. Artists use line to outline shapes, to evoke forms and movement, and to imply solid mass. Lines may be light and slender or dark and thick. Lines may be perceived as tentative, elegant, assertive, forceful or even brutal. Psychological responses are attached to the direction of a line.
Vertical lines are active.
Horizontal lines are passive. Diagonal lines have movement, energy or unbalance. Color Color is a central element in our spoken language. We connect emotion with color. Blue can portray sorrow, red can evoke anger and green can convey envy.