What color should I paint my house on the outside?

I bought my house over 5 years ago. It’s brown and a tan (which I figured out was a yellow at one time. Porter paint is having a sale, so I got swatches today. I’ve been stewing over this a long time. My roof is red. I was going to take the brown away and go with charcoal grey. Maybe do a yellow or light orange. I’m surrounded by a picket fence, now in brown…going to a stain?
i have a beautiful periwinkle swatch. Do you have to match your roof? I have lovely tiger lillies in front (orange)
What do you think, design team?