Don't ever apologies for providing advice, that after all is why we are all here 👍 and the great thing about advice is that the user can choose what to do with it. In this case I shall be applying it to the letter.
Is there any chance someone could update the Topic Color, Colors, or Blue Posts plugin? Ideally I'd like to be able to color topics (and the text therein) created by individuals of a certain group (being able to set a unique color per group would be ideal but if they were all blue that'd be an acceptable compromise). Topic Color ("Colorify Topics") seems to almost work but there is an issue with selecting the allowed groups to color their topics, and even after finally being able to do so I have been unable to see any effects on my forums using the provided syntax.
Is this simple enough for someone to whip up and do for free?