I have been playing around with the website: https://colourise.sg/#colorize which allows you to upload black and white photographs and it will attempt to colorize those same photographs. Recent attempts:
Leila Weaver and Andrew Strachan – 16 May 1944
Andrew Strachan and Leila Weaver – 16 May 1944 (color added 17 May 2019)
Florence Koontz and Lee Weaver – 27 May 1918
..
Lee Weaver and Florence Koontz – 27 May 1918
Obviously, the site does a much better job on photographs that are in the best of shape to begin.
The above picture of my grandmother (center) was also taken on her wedding day with her sister, Essie, on one side and her mother, Phebie Ann Gardner Koontz on the other. The coloration is much better.
And the whole Koontz family portrait really came out well:
A Tree Grew in Oakland 