kolam around a plate - traditional decoration for wedding
Turmeric powder is mixed white rangoli powdeer till the colour turns yellowish. Simple decorations are drawn around the leaf. Some of the designs are shown in the images.
For important festivals like Varalakshmi Vratham, Ganesh Chathurti, Navaratri there is also a tradition of decorating the banana leaf or plate on which the naivedyam is served to the family members with this type of kolam.
For the leaves on which the bride and bridegroom dine , more elaborate kolam can be drawn.
This post may also answer the following
a) Tamil wedding kolam
b) Rangoli designs for marriage function