Red makes you look. That's just the way it is. If you want to get someone's attention, make a red quilt.
I took the following photos on a couple of my morning walks in California. First, this double door. The structure was good but not spectacular. It was not surrounded by particularly lovely dwellings. But those doors and that dark wood around them were marvelous.
Look at the same image, cropped. So nice. The shift in the angles of the lines and the subtle changes in value in the reds and browns make this really good to look at. That bit of vertical white in the lower left along with the very subtle horizontal line of white above the door bot add to the composition. Those light bits make the tiny round lock even more visible.
And then there were these fancy geraniums...
Do you smell peppermint? That's all I could imagine when I looked at them.