Stained glass / glass painters - can I paint my stained glass?

[waltzingparrot]

Can I paint the stained glass on my front door. I'd like the green bits to be blue (probably have to be navy blue to cover). The coloured glass is actually on the outside rather than sandwiches between.

If so, what paint can I use to withstand weather?

Those are pieces of coloured glass rather than painted glass. I'm not sure there is anything you could use to good effect. Traditional painted glass to be used in windows has to be fired in a kiln.
You could try some hobbyist glass paint but not sure if it will be hard wearing and may just make it look dirty I'm afraid. Could be worth a try though if you really don't like the green