Left border colors indicate which 4chan/8chan board the Q post was posted to. The "Patriots Fight" board is Q's private board where only Q team is allowed to post.
Post # (e.g. 3570) colors indicate when a post was made. It makes it easier to see which posts were made today, yesterday, etc.
The background colors of the ID's differentiate between different Device ID's used to make posts.
Example: ID: 56d97c
Currently displaying post dates/times in Eastern time. To set your timezone use the cogs icon at the upper-right.