I found the comments on this website very interesting... especially this comment:
Yellow is the second most visually attractive colour after red.
RED:
A warm powerful and attention getting color. Red is a very visually empowering and attractive colour for an e-book cover. Cardinal and tomato red offer impact and creativity and a pure red is always a good choice.
The colour red is extremely dominating. Red reflects energy and can motivate an individual to take action and hopefully to buy your book. Used as an accent color, it can stimulate people to make quick decisions and increase expectations creating a high arousal threshold.
Words associated with this market include:
Truth, strength, courage, excitement, creative energy, desire, danger, power, speed, passion, love, lust, sex, aggression, heat and fire. It represents all things intense and passionate.
YELLOW:
Pure yellow produces sensations of brightness and warmth reminding us of warm, sunny days. Yellow is the colour of lemons, buttercups and rich cream. Sunflower and winter squash can be used in your design elements of your e-book cover to increase visual impact.
Yellow is the second most visually attractive colour after red.
Because this is a luminous colour you will notice yellow tends to disappear into the page so often needs a strong colour to highlight and bring it out especially if used against white.
Words associated with this market include:
Original, imaginative, joy, happiness, idealistic, creative, artistic, spiritual, optimism, intellect, love of learning, light, sunshine, summer, fold, philosophy, cheer, hope, happiness and energy.
Color Psychology Website
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