I would be incline to paint it in the green taken from the colour of the leadlight this will make a feature of your front door but at the same time won't detract from the leadlight or as others have suggested a brick red to complement the brickwork.

:o) and that looks beautiful too. I love the combo of your tiles, the charcoal and red. It makes me smile that we all take an interest in each others projects. I wonder if it is a combo between wanting to help each other because we know how stressful renos can be, plus loving beautiful design, plus the "dream" factor...in that we think about what we would do in a similar situation.....Seeing the whole look now.....the colour I suggested wouldn't have worked anywhere near as well as what you decided on....Hehehe.

are the new sliding glass doors double glazed? are the original windows single glazed or in need of replacing for any other reason? do you hate the beige colour? how many of the old windows can be seen at the same time as the new doors? ... inside looking out is the most important view for me but what do you like the look of?

Porters yacht race..... not yachet, is a good quality paint. If this is going on your front door, you have to be aware of any fading that may occur because it is a darker colour. Choose the best quality paint for a front door.