WHY DOES A PINK COLOR FORM IN THE SOLUTION, WHEN DOING A GRIGNARD REACTION

doing a experiment for the synthesis of triphenylmethanol. While doing the experiment, a pink color forms. why? what is it caused by?
Please explain

Actually, a pink color is common in Grignard reactions, and it usually comes from a metal impurity such as nickel, iron, or chromium. The impurity may come from your magnesium (unlikely), or more commonly, from a metal spatula, stirring rod, hypodermic needle, or spinbar. The impurity is usually very small, and generally has no effect on the reaction. There have been some interesting Grignard reactions, however, where other metals have shown a catalytic effect on the reaction and actually affect the course of the reaction.
In your reaction, presumably bromobenzene plus magnesium plus benzophenone or a benzoate ester,
your pink color probably means you touched the solution with a metal spatula, which gave it a little bit of pink color. It won't make a bit of difference.

Whats the grignard you are using?, and whats the full rxn?
physical observations are important but raw data is more conclusive, does your H-nmr show your product?, does it show any impurities?