Sick Bumblebee, please help

[Solarsoldier001]

So my guy decided to pick up a sickly Bumblebee and try to rescue him to good health . I was curious is it normal when a snake becomes darker or loses color that it is getting sick? This bumblebee looks dark brown where it should have a light brown to orange/yellow color.

if you like here is a picture of him, he is also a 2010 bumblebee not a 2011



and this is our 2011 bumblebee that isn't sick



I noticed that our 2011 bumblebee is becoming darker the more he sheds. But he isn't at all the color of the 2010. So I'm just curious to whether if a massive color change is bad or not

thank you