Sick leaves, Picture

[Volcano_Lover]

My girl is 4 weeks into flowering and looks healthy apart from some of the large fans leaves look sick and have purple stain on them. Does anyone have nay ideas what could be wrong here?:
282592
Thanks for looking :)

[polishpollack]

can you take a pic in white light?

[M1K3]

If there on the bottom of the plant you sould be OK.