Help with HEM

I am trying to get to grips with HEM and a couple of basics things
I cant understand and I wonder if anyone can help me?

1? on the HUd what do the colours mean? some are red,
some are blue, yellow etc and I cant work out the
significance?

I only play mainly PLO with a bit of OHL, does anyone
know a good HUD set up for PLO and what a good
aggressive factor is?

thanks in advance for your help

I can only really help you on the first question because I haven't played enough PLO or OHL to get my numbers worked out for a decent HUD.

The default colors, if I remember correctly, mainly gear towards green being more fishy, red being more nitty. So someone with a high VPIP would have a green color for it, but if they had a low PFR, that would have a red color to it. Really, the default HUD sucks. I would really recommend doing some research and creating your own with what you really want out of it, and with the colors you feel comfortable having. Some people set theirs up with damn near every color of the rainbow, some people don't use any colors at all. It's all personal preference.