I recently got a shed built and I want to paint it the same color as my house. Unfortunately the house is covered in colored stucco and the shed has wood siding. I managed to find an online image of the stucco color. But stucco has bumps and isn’t a uniform color. So I used this average color finder to work out the target color.
My preferred paint is Kelly Moore and so I went to their site hoping to be able to search based on some RGB values, but alas that wasn’t going to work out. Their color picker is fancy but there didn’t seem a way to find a color close to a particular color. I did some digging and found out that all their colors were being sent to the browser in a json file. So I grabbed that and wrote a little closest color script to find the color closest to the one I wanted. You can get the closest color script here.
I could have gone nuttty and converted it to HSV colorspace and found an even better match, but there are so many colors that just finding the minimum of the differences of red, green, blue got me close enough.
If I thought more than 2 people a year would use it, you could easily make this a nice webapp, mapping from one paint manufacturer’s colors to another or just from any RGB code to a paint name.