Sure. The Jojo manga has been translated into English and is accessible in many bookstores and digital stores. Some versions might have differences in translation quality, but you'll have options to choose from.
There are several Jojo manga series that have been translated into English. Some of the popular ones include 'JoJo's Bizarre Adventure: Phantom Blood', 'JoJo's Bizarre Adventure: Battle Tendency', and 'JoJo's Bizarre Adventure: Stardust Crusaders'.
Sure, JoJo Part 7 manga is available in English. But the availability might vary depending on where you look. Some physical bookstores or online platforms might have it in stock.
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.