Blue flowers...Rich, deep blues, found in the beautiful hydrangea and the extraordinary iris, offer serenity. Blue flowers have a calming effect. They cool the emotions and create a contemplative mood. Imagine the easy pace of lying on your back and watching clouds float across a brilliant blue sky. Consider too the bliss of staring out at the calm blue sea. Blue flowers also speak of intimacy and are perfect flowers for long-term couples who want to communicate their deep and abiding trust.