from the reading that i have done on the subject, implantation bleeding could range from light pink to light brown in color. if it is implantation bleeding the pinker the color could indicate active implantation, if the implantation bleeding is brown in color it could indicate implantation that happened a while ago, it just took a little longer for the blood to break through.
of course all the stuff mentioned above is IF it is implantation bleeding. brownish discharge could also indicate that your period is coming.
if you suspect it is implantation bleeding, wait a few days and take a hpt. if you are pregnant there should be enough hcg built up by that point to give you a result. best of luck to you!!
I dont think so most of the time this is old blood and the start of a new period. Implantation bleeding is usually a light pink in color and lasta about 2 days.