Our landscape has been white for so very long that a bright burst of yellow is a true signal of spring.  I spent some time at the McNeely Conservatory where it is spring, under glass.  Yellow and red tulips, ranunculus, crocus, and daffodils are wonderful (and needed) reminders of the season of spring.  These yellow tulips were set off by the blue reflection of the sky in the water behind them.  Soon enough we will have spring outside too, and not need to go inside to experience it.