Red: Red is the symbol of love. To give red roses says "I love you still" 
White: Shows purity and innocence. They also represent humility, youthfulness and charm. 
Pink: To give pink roses shows grace, joy, and gratitude. Pale pink also has the meaning of fun attached to it. 
Orange: Desire and enthusiam. These would be a great choice to give to someone if you want the relationship to develop further. Lilac and Lavender roses also show these feelings. 
Yellow:Joy and friendship - yellow roses don't specifically show love. They can also represent starting over,or a new beginning. Yellow tipped with red shows friendship falling in love.

12:The standard for "be mine". Often given on Valentines day, when for a married couple,actually 7 or 10 might be a better choice.

The surprise came at around 11:12am. Its a couple bear with 12 pink roses!!! My favourite pink! :) Haiya Dear not around to see me smile. I'm smiling since just now for the past 5 minutes le. Lolx... The second bouquet of roses from Dear. :))