Color offers an instantaneous method for conveying meaning and message. Our minds are programmed to respond to color. We stop our cars for red lights and go on green, we look at the color of certain plants and animals to determine whether or not they are safe for us to eat or touch, the bottom line is that color is a very important part of our daily lives. Symbolic meanings of colors have psychological connotations. Nevertheless, colors effect us psychologically regardless of any symbolism. And the psychological effect of one color can be very different from its symbolical significance.

If you understand the psychological effects of colors, you can employ them  deliberately. While perceptions of color are somewhat subjective, there are some color effects that have universal meaning. Colors in the red area of the color spectrum are known as warm colors and include red, orange and yellow. These warm colors evoke emotions ranging from feelings of warmth and comfort to feelings of anger and hostility. Colors trigger a variety of emotions and memories. The interpretation of color depends on age, profession, nationality, and personal preference.

Here are some general interpretations of colour psychology;

RED
Positive: Physical courage, strength, warmth, energy, basic survival, ‘fight or flight’, stimulation, masculinity, excitement.
Negative: Defiance, aggression, visual impact, strain.

YELLOW
Positive: Optimism, confidence, self-esteem, extraversion, emotional strength, friendliness, creativity.
Negative: Irrationality, fear, emotional fragility, depression, anxiety, suicide.

GREEN
Positive: Harmony, balance, refreshment, universal love, rest, restoration, reassurance, environmental awareness, equilibrium, peace.
Negative: Boredom, stagnation, blandness, enervation.

PINK.
Positive: Physical tranquillity, nurture, warmth, femininity, love, sexuality, survival of the species.
Negative: Inhibition, emotional claustrophobia, emasculation, physical weakness.

GREY.
Positive: Psychological neutrality.
Negative: Lack of confidence, dampness, depression, hibernation, lack of energy.

BLACK.
Positive: Sophistication, glamour, security, emotional safety, efficiency, substance.
Negative: Oppression, coldness, menace, heaviness.

WHITE.
Positive: Hygiene, sterility, clarity, purity, cleanness, simplicity, sophistication, efficiency.
Negative: Sterility, coldness, barriers, unfriendliness, elitism.

BLUE.
Positive: Intelligence, communication, trust, efficiency, serenity, duty, logic, coolness, reflection, calm.
Negative: Coldness, aloofness, lack of emotion, unfriendliness.

So the main reason I chose blue for my logo is because of the word – Thought = intellect, logic and intelligence. Also blue is the overwhelming “favorite color.” Blue is seen as trustworthy, dependable and committed. The color of sky and the ocean, blue is perceived as a constant in our lives.

Many people have used blue to convey intelligence, here are but a few examples;

I have not even scratched the surface of colour theory, but if you wish to delve deeper then the following sites are a good place to start.