Any mold has the potential to be dangerous. Every mold has the potential to affect your health and the health of those around you, especially for those with autoimmune disorders or already compromised immune systems. If you find mold in your home it is imperative to do all you can to tackle it as quickly as possible before it becomes harder to deal with.
However, if you find that mold has developed after some time, any colored mold can be dangerous.
There is a mold called aspergillus, which is a very common mold found in American households. There are, however over 185 species of his mold and so it can appear in a whole multitude of colors. This mold has long flat shaped spores that form thick layers and it creates a chain of mold growth along surfaces. It is an allergenic mold but can become more toxic depending on the species and the environment that it is in. It is capable of leading to symptoms such as asthma attacks, lung infections and respiratory inflammation. Certain species of this mold are also capable of producing aflatoxins which are a deadly carcinogen.
A lot of molds are harmful to those with compromised immune systems, and some people will have different reactions to mold than others. The general point with mold is to not label certain molds as dangerous and some as safe, but to simply get rid of any mold you encounter in your environment as soon as possible, to prevent any possible problems that it could cause, regardless of the scale of the mold, the age of it in the place it is in, and whether you are healthy or not.
Of course, it is well known that black mold is the worst of the worst. But in this sense it refers solely to stachybotrys mold which does cause health conditions. However, molds such as aspergillus are just as dangerous and this mold can be any color. So it is simply best to avoid any mold, of any color, at all costs to prevent any danger at all. If you see any mold in your home, call a specialist right away, even if it might be fairly harmless. Better to be safe than sorry.