It's hard to predict exactly. The pace of the anime and the progress of the manga are subject to various factors, so it's not straightforward to determine when they'll align.
Most traditional manga are black and white to keep production costs down. But nowadays, you can find a good number of color manga, especially for popular series or ones targeted at a younger audience.
Manga isn't always black and white. Some publishers and artists choose to use color to make their works stand out. It depends on various factors like the target audience, the theme, and the budget.
Mostly, manga is hand drawn. Artists start with sketches by hand and might use digital tools for coloring or adding effects later. However, the core of the creation is still based on hand-drawing skills and creativity.