Math & Science ⇒ thmbox and colour of the bar

[barefoot1980]

please help me here:

we use the "thmbox.sty" for writing theorems, examples, etc. it can create a nice bar around the examples or theorems. we would like to make these bars in blue or other color. but donot know how to do it?

are there any other packages which can create colourful bars around theorems, examples, etc.

thanks