One option could be to check if there are any officially released color editions of Bleach manga. Sometimes publishers come out with special colorized versions. Another way is to search on dedicated manga reading platforms, but not all of them might have the color versions available.
In my opinion, both have their merits. The anime brings the characters to life with animation and sound, but the manga allows for more imagination and detail in the panels. It really comes down to what you value more in your entertainment.
It's possible that there could be a new Bleach manga in the future, but as of now, there's no concrete information or confirmation. Maybe if there's enough demand from fans or the creator has new ideas, it could happen.