The color of breathable planetary atmospheres

Is it plausible that a planet can be breathable despite the color of it's atmosphere? My story takes place in an alternate reality in which what people thought the Solar System was like in the 50s, Venus is a swampy, breathable world, Mars is a dying, desert world with canals, but it is breathable as well, is the reality. Would being breathable affect it's atmospheric color or should I just not bother?

is a duplicate

This question has been asked before and has already been answered. It should be marked as a duplicate.

Please enter the URL of the proposed duplicate in the details field below.

not constructive

This question cannot be answered in a way that is helpful to anyone. It's not possible to learn something from possible answers, except for the solution for the specific problem of the asker.

Communities

The color of breathable planetary atmospheres

0 comment threads

0 answers