problems with mirroring displays to sony led tv

i have imac hooked sony bravia 46 led tv via hdmi connection. works fine except mirrored image on tv not identical of mac screen. image on tv has overall magenta tinge. tv new , works perfect bluray player. else have issue?? suggestions on fix??

 

you may need color adjustment input you're using. sony's color adjustments specific each port (at least, on bravia).

 

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