There appears to be several versions of that motherboard. Is that the complete part number? Note the
Link Removed does
NOT support USB3.0. However, the
M4A77T/USB3 does. So clearly, you need to verify your part numbers before moving forward.
If your board does support USB3.0, then you can just run the necessary 3.0 cables to your case's front panel connectors.
If your case does not support USB3.0, then you will need to add support, if you really need it. There are many to choose from, but first you need to determine which interface you want to use. You mentioned PCI, but if possible, I recommend PCIe. See,
Google: PCIe to USB3.0. If you insist on using PCI, then,
Google: PCI to USB3.0.
Do understand 3.0 will do you NO good, unless your devices are 3.0 also.
Sadly, there is no industry standard on color coding. I have seen red, yellow, blue and black. What I typically see is motherboard makers use one color for 2.0 and a different color for 3.0. Basically, it is what their designers think looks pretty.
Practicality seems to have fallen by the wayside.