Update:
My cunning plans, both A and B failed! 
But don't panic, all is not lost. I gave my very best shock at mistake face but he didn't fall for it. He did however say that if I really wanted a pink house, I could have pink house. Yea! But I'd have to paint it myself. 
This left only one option. Emotional blackmail. 'If you loved me you'd paint my house pink for me. Some of my friends on mumsnet have pink houses. Their husbands really love them.' Kept it up all night, backed it up with a few emails to him at work and a post-it in his sandwiches 'pleeeeeeease can I have pink house'.
He has now conditionally surrendered. He will paint the house white and the doors will be pink. He's going to put up shutter (very common here) which can be pink or purple (my choice) and he'll paint all the garden furniture/trellis a 'hideous girly colour' of my choosing. :o RESULT!
As a bonus, he's also agreed that when we win the lottery and can therefore afford it, I can have the car reprayed in the same colour as the door as that too is a sort of garden accessory. (I have a sneaky suspiscion that he didn't mean this and was taking the mick
Happy, happy, happy. Oh, and I'll stick a photo of the paint on my profile tomorrow when my daughter gets home with the camera so you can see how perfectly pink it is. :o