Where does this discharge come from? Plants? Animals? Humans? Repost your answer with more information, and you will get a good answer.
Yes, it is bad if your rabbit has a brownish discharge. If your rabbit has a brownish discharge, it is sick and you should bring it to the vet. See the related questions below for more info and links. A discharge of any colour, from anywhere on a rabbit's body, is a sign of illness, and the rabbit should see a vet with experience and training in rabbits. Normal, healthy feces are solid, brown balls. Normal urine is liquid (not at all thick) -- it could be clear or pale yellow, or it could be reddish, orangish, or dark brownish -- these are all healthy and normal. A thickish brownish discharge from the genitals could be something called "urine sludge," which is not healthy and, without treatment, could lead to serious problems.
A reddish brownish mix
reddish brownish blondish
A fox.
Brownish red.
It's a brownish-reddish color
reddish brownish
Its a reddish-brownish metal. Its also a soft texture
dark reddish and brownish or purple colored
reddish brown (more brownish)
the red pandas fur looks reddish - brownish
it was reddish - brownish