Taste and color don't mean a thing especially with very low concentration compounds like Clenbuterol HCL tablets. Imagine that a tablet has at least 100mg total and you supposedly have 0.04mg of active ingredient which means 0.04% which is incredible small amount of material for anyone to taste or smell. So taste, smell or color is irrelevant in this case (opposed to Dbol for example which is to be found in concentrations between 5% or 10% for a 10mg dbol tablet and tastes bitter and is very unpalatable).
However, Clen is very easy to detect by its effects once consumed, you should have noticeable effects even from a single 0.04mg tablet, not to mention in case of 2-3 tabs you're supposed to have increased heart beat, tetanic contractions (in my case horrible and happen almost every time with Clen), intense limb tremors, tachycardia and hyperthermia.
So if you've been taking 3 tabs of 0.04mg each and no effects, throw them away. Fake for sure.