This is not a Los Angeles-centric post.
Mads Madsen of Denmark, spend hours, days, and weeks colorizing historical photographs so that others can appreciate and feel closer to the subjects.
This picture of Abraham Lincoln, taken when he was elected in 1860 but before he acquired his famous beard, is one example.
(That link at Madsen's name will take you to an Atlas Obscura article about him and other artists, and about their Reddit page.)
Here is a six-minute Vox video about more artists and the incredible amount of time and research that goes into colorizing old photos.
And if this and other things historical interests you, maybe you'd like to subscribe to my newsletter, The Triweekly Report. Three of the most fascinating history stories I find, sent out every three weeks. Fill in your name and email in the form to the right if you want to try it out (you can unsubscribe if you don't like it ... but you'll love it).