The theory is based on scientific and psychological grounds. Yet theories are theories, and almost every theory has a contradicting theory.
That is why you should be familiar with the fundamentals behind the theory. To approach your business branding with knowledge and not in an impulsive way.
The color wheel includes primary, secondary, and tertiary colors in it.
Primary colors: red, yellow, and blue.
Secondary colors: green, orange, and purple (created when primary colors are mixed).
Tertiary colors: made of primary and secondary colors. Such as blue-green, red-violet, and so on.
When referring to the psychological and emotional levels. Each color reflects differently in our subconscious.
Red: confidence, desire, strength.
Blue: wisdom, stability, loyalty.
Yellow: energy, fun, joy.
Orange: creativity, enthusiasm, happiness.
Green: friendly, life, harmony.
Purple: power, magic, spirituality.
Pink: inspiration, compassion, hope.
Brown: organic, health, comfort, nature.
Gray: security, self-control, mutually.
Black: formal, classic, luxury.
White: purity, simplicity, clean.
The graphic language of your business is a significant choice. It will represent your business; who you are as a professional.