This NuGet package contains methods allowing you to get the average color of an image by either passing through the bytes of the image, or passing through the URL of an image.
The rgba hex value is then returned (eg: #ff000088).
This is a work in progress and I'm open to ideas on how to increase the speed of this and also how well it calculates the average color.
I needed to get the average color of images for Musicstax.
Once installing this package, there are two methods you can use:
GetImageColor.AverageFromUrl(string url, string defaultColor = DefaultColor)
GetImageColor.AverageFromBytes(byte[] imageBytes, string defaultColor = DefaultColor)
An example might be:
var averageColor = await GetImageColor.AverageFromUrl(url);
which will return a string, eg: #ffffffff
As you could pass through an invalid URL (or perhaps you don't have permission to view it), there is the possibility that an average color can not be calculated. In this case, by default #000000FF will be returned if the FromUrl method can not fetch the image. This is the color black.
You can override this default color by:
var averageColor = await GetImageColor.AverageFromUrl(url, "#FFFFFFFF);
I am keen to expand this to get the most dominant color from an image, which will come soon.