Can people with poor color sense draw good illustrations? It is said that only people with good colors can draw cartoons. Is that so?

No ~ color sense can be trained ~ although some people are born with better color sense ~ they just master it quickly ~

What's more, there are black and white illustrations in illustrations ~ even color illustrations will draw their own styles after more practice ~

Don't worry about the problem of poor color vision. Make up your mind and do it. It won't get in your way!