I think you'll have to go with white or whatever looks best indoors in those rooms. You can always think about getting the windows colour bonded at some point instead of replacing them. Then you can choose any colour for those inside and out! You can paint UPVC yourself - All of our windows inside are painted the same colour as the walls in those rooms so that the windows blend into the walls. They were dark brown / mahogany ( vile ) - Outside they are all sage green. If you're going to paint the frames inside which will brighten the rooms and let you have whatever colour shutters you like, use Zinsser 1-2-3 primer and then paint away.

Hi Lauren! I worked on a project with a similar situation! The windows were in a spare bedroom, so ideally they really did need to be covered at night time, however only when people were staying over. We had venetian blinds made for the standard rectangular window, then for the 2 angled windows, we produced a 'shield'. Basically, we got our joiner to make two shields which were templated to the same shape as the window reveals, with a handle in the centre, which then hooked on to the window. So they could be taken up and down as you wish. They were produced in oak and finished the same colour as the rest of the joinery and blinds, with a handle in pewter to match the rest of the ironmongery in the house. Unfortunately I don't have ay photos of the shields, but you can see the window, and the hooks that the shield mounts on to! We found this to be the most simple, unfussy option, and you are still able to see the windows in their full glory. The shields are kept in the cupboard when not being used. I hope this helps! Holly @ MillChris Developments Ltd

I too thought shutters would block out too much light, but the look when fitted is so lovely, and with wider size slats, the more light they let in. The pics below have small slats but its the same style of bay with shutters. Also don't have the push rods on the front if you want a cleaner look. Having the slats split so top/bottom open separately like pic below is also good if you want privacy without shutting out light from the top. High gloss shutters also reflect light into the room and shutters seem to go with any look, period or contemporary.

I’m in Hertfordshire and I used Globe Home Improvement. They have offices in Beds and London. I’m not sure if they cover your area but worth a call? Have a look at their website and Facebook page. They are a family run business and Phil is so helpful. Great after-sales service too.