You have to consider your public and what platform(site)/form (digital or printed) the comic was created for.
Manga are mostly B/W but they include lots of details, depicting lots of action. They were meant to be printed and read in a book style. That's why you read it from right to left.
Manga were done in B/W mainly because artists lacked time to color it each week (weekly jump).
Now comics like DC/Marvel had more time to get printed so they took their time to do it with color.
Unlike manga western comics didn't really share the space in their printed version with other authors.
Moving on to webcomics, they were greatly influenced by manhwa and manhua.
Both of this comics were designed to be read in a cellphone vertically.
That being said manhwa influenced webcomics more than manhua. Mainly in art style.
Manhua have more details but are way shorter than manhwa (in general).
Manhwa gets updated weekly but characters usually have less details allowing authors to make a longer comic than a manhua.
Manhwa episodes are still short allowing them to be published weekly.
A huge difference between manhwa author's and manga author's is that the former can take a break to prepare for the next season to keep a schedule while the latter can only take breaks during japanese holidays or when they get sick.
Knowing the history of how comics have evolved we can say B/W is not better than color and vice versa.
They are just practiced that way for different reasons.
If you want tl draw lots of details with a very limited time then B/W is a better option. But if you want to draw adding almost no details then you should use color.
Another thing you have to take into consideration is where you are uploading your comic. If it is a platform meant to be read up to down then you should use a manhwa/manhua style comic (with this logic your comic should be in color with short episodes and few details).
If the platform doesn't allow you to read up to down and instead you have to press next to see the next image then you should use a traditional comic/manga style be it in B/W or in color it all depends on the amount of time you have between each episode being made public.
Having said that, tapas' main attraction are korean manhwa. So you should consider that most people join for that korean Manhwa style since they want to read from their phone.
Webtoons is also a platform that has adopted this style. That's why all their serialized comics are done like manhwa but with more details and longer episodes (not by much) than a traditional manhwa.
Having said that it doesn't mean people won't like manga style art. But it will be far less popular due to the nature of said platforms.
If you want to publish a more traditional manga style comic in B/W I recommend using platforms like MangaPlus Creators. These platforms/sites are made for creators with this iconic style.
P.S. Western comics were also limited by their printers. If I recall correctly the hulk was originally supposed to be gray but got changed to green since the printer was having trouble with the gray version.
Comic history regarding color/B&W is very interesting and long.