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Change marker background color from field

Question asked by on Aug 16, 2016


   I have following questions

      1) I want to know if it is possible to change the background color of a marker symbol from field. 

      2) Line color takes blob field to store the color, but we wanted to change the color on some field value so firstly we got             the blob value of color in probably  hexadecimal form and and inserted in another table , then in the update /insert             trigger  we get the value of the field, found the appropriate blob from other table and updated the color value in the             the  layer table.  I wanted to know if it is the right approach? And is there any other  way to to get blob value of             specific  color ?