A female colleague sent a text message saying that there was something attractive about me. I don't know what this means.

I think your colleague may refer to "attraction" in two ways. On the bright side, she is implying that she likes you. Another possibility is that she is in love with your money. Who doesn't love money? This is just my personal opinion. You can ask her further what attracts her. If the former attracts you, you might as well know more about her.