Is it bad if i'm having light brown vaginal discharge?

They may be blood: that is old being cleaned from the vagina.

Hard to tell....: Colored discharge -- yellow, green, or light brown (beige or tan) -- often means infection. Get professionally examined if it persists more than a few days, if there is strong odor, or if you are at risk for STDs, such as a new partner, a partner with others, etc. Also if there are other symptoms, such as vulvar irritation, vaginal spotting, or lower abdominal pain.