One of my favorite plant combinations at the IDEA Garden in the Tyler Rose Garden present a striking, almost shocking, contrast between dark purple, almost black leaves, and bright chartreuse yellow leaves of 2 close relatives. 
Standing taller in the back is Coloscasia esculentus 'Black Magic', sporting huge, dark elephant ears that maintain their rich color throught the heat and sun of summer. Sited right in front is a slightly shorter growing Xanthosoma 'Lime Zinger' with light yellow-green, or chartreuse yellow foliage which almost hurt your eyes they are so bright. Each one sets the other off perfectly. The site is well suited for these moisture-loving plants; a narrow bed constrictred by a wall, patio and drive stays moist throughout the year.
