Rosemary leaves changing colors
 

I need help with finding out if anything is wrong with my Rosemary
bush. I have just recently moved it back outdoors for the spring and
summer. I have noticed however that there are some of the leaves
turning a deep purple color. I know that it likes sun because of where
it was last year but it almsot looks like it is burnt. I have searched
everywhere I can find but cannot find any information on it. Thank you
for any assistance.