In drawings and paintings of chakras the symbols are usually depicted as wheels or lotus flowers. Each chakra will appear separate from one another. But, if you were able to view your chakras energetically you would notice that the chakras will naturally blend or bleed into one another.
Chakras are energy centers with a living pulse. Energy is not static, energy is in constant flux. Chakras not only open and close, they will also expand and retract. When a chakra expands the boundaries separating it from its neighboring chakra/s can become blurred. As the chakras move and interact with one another the colorful imagery might remind you of peering through a kaleidoscope.
It is not unusual for the sacral and root chakras to intermingle and display a brilliant blood-orange color. The heart and throat chakras may merge and display beautiful bluegreen shades when you are singing from the heart.
When a stressed chakra is shutting down, a healthier chakra will often expand to compensate for the lowering of the whole energy system. The chakras are typically team players. Still, it is not healthy for any one player in a team to pull more than his share of the weight for prolonged periods. Expansion for the sake of picking up the slack will eventually put strain on the relationship. Ultimately, the whole team will suffer. And in the case of your chakras, when the chakras are not functioning together optimally as a healthy team illness and disease manifests.