Another option is to check at local book fairs or conventions. Sometimes, there are vendors who sell 'jojo light novels' along with other anime - related merchandise. It can be a great way to get your hands on them and also explore other cool stuff at the same time.
The JoJo manga is mainly in black and white. Colored versions exist but are not the norm. Sometimes, colored illustrations are done for promotional purposes or by fans.
I think it's great. The characters are memorable, the plot is full of twists and turns, and the battles are epic. It's a manga that stands out from the crowd.
The JoJo manga is mainly presented in black and white. However, there might be some special editions or colored illustrations for promotional purposes, but the standard version is not in color.