"Yes, that's what coloured the photos Pats posted. Some sites are better at the job than others. The one I used produced the results shown with those. Having coloured Rain's photo the old painstaking way (in a program using individual colours,) I tried that one in the same site. It made a poor job of it. Some of the clothing it saw as blue, some as brown. Colours not right at all with the rest of it."
Most times if the photo is Sepia to begin with is best to convert it to B&W, then sharpen it, before colorizing.
Also, many Colorizing programs, both Software and online convert some colours to blue?,(Dont know why)
It is now that when this happens you need a colour picker tool, put the cursor over the none blue part, and read the R.G.B composition,and then manually paint over those parts(Using the R.G.B numbers) so match the non blue parts, with practice by changing the feathering and opacity of the colour it will match.
RGB = Red Green.Blue