Same as flowers have their own meaning, their colours do too. Each flower colour has a meaningful story behind their colour.
Red is the colour of love and passion. Sometimes this may also indicate a stronger feeling of desire, courage and strength.
Yellow is the colour of friendship, joy and happiness.
Blue -is the colour of stability, trustworthy and tranquillity.
Deep blues tend to be more 'trust' based colors, while lighter blues are signs of peace, quiet, and tranquility.
Pink -is the colour of romance, sweetness, playfulness and gladness.
Purple/Lavender -is the colour of enchantment, royalty, unique, noble, devotion and trust.
Orange - is the colour of fascination, warmth and happiness.
Green - is the colour of harmony, good fortune and health
White - is the colour of purity, innocence, perfection, sophistication and hope.
But whatever the colour is, the real meaning still lies on what you feel towards the person who gave the flowers to you. The color may add to the beauty of the arrangement, but at the end of the day, only your heart will know what the true meaning of the colour of flower you received is.