Which color of cerebrospinal fluid (csf) may indicate subarachnoid hemorrhage in the client?

A reddish tinge in the cerebrospinal fluid indicates that there is internal bleeding, or hemorrhaging, or is a sign of spinal cord obstruction. 

The cerebrospinal fluid (CSF) is a clear, colorless fluid found in the brain and spinal cord. The main function of this fluid is to cushion the brain and spine from impacts and blows and protect these vital components of the body.

The answer is constant.