Red coloring on fan leaves

hi everyone

just wondering if fan leaves should take on a redish color. i have noticed over past week or so my fan leaves have a lush green look but they also when looked at carefuly have a red'ish tint too them also.

is this bad or could it just be the strain showing. taking pictures does not show this coloring effect for some reason but they are turning a red'ish haze color.

any idea's info welcome

Tamzi