Is there a better way in Photoshop to convert a black & white image into color other than just selecting the area and fill with color?
by using Hue saturation u can change the black&white picture to colour
select the area u want to change click the adjustments in the bottom of the layer panel and select hue&saturation by these u can change the colour dont forget to check the colorize
There is no color information in the image, only tonal information. Unfortunately, the best I could suggest is to make your black and white image a multiply layer and paint the colors on a layer(s) underneath.