According to the Victorian Language of Flowers,

White flowers tend to symbolize purity and innocence as well as naivete and preference for simple life. When mixing flowers, white is the great ameliorator, and often comes between two colors that would otherwise clash. Their fragrance is strongest in the evening.

Yellow flowers denote a negative feeling, but can also mean imagination, intellect and idealism. If you love yellow, you have a tremendous imagination, drive for self-fulfillment and make a good confidante and a true friend.

Red usually symbolizes ardent love, passion, and enthusiasm. If you love red, you may be enthusiastic, extroverted but prone to impulsive moods and actions.

Pink suggests a softer and more innocent emotion. A love of pink may indicate wealth, a good position in society, and a character full of warmth and personality. Those who love pink may be pampered, loved and cared for.

Blue indicates introspection, sensitivity, and conservatism. Lovers of blue tend to weigh options carefully and are cautious about taking action.