We are using Google material design for all of our front-end.
The current colors we are using for our front-end are from the material design palette here: https://material.io/color/# Please note that we may change these.
The logo should probably use different colors, but within the material design color palette. (We also may change the colors we use, so feel free to pick any good combination of colors from the material ui palette.)
Note, we also love "vaporwave aesthetic" / retro, but use your judgement as to whether it's totally appropriate.
You can use any combination of lower/uppercase. Generally all lowercase is probably preferred. No word separation between flux and guard.
Edit: Shields and other direct references to "guard" are okay... but perhaps a bit too blunt for this product. This product will be used to, e.g., catch small CSS changes to a site. So, a focus on FLUX (i.e., change) and catching small changes is preferable to a hard-edge immovable "shield."