There are a few liveries I wish I could find info on such as Fitzhugh and Greystoke (any suggestions out there?)
Sometimes, but not always, where someone was a Knight of the Garter, their stall plate shows their coat of arms on a shield, along with their badge as a crest and their livery as decoration. Sometimes the colours are the same, sometimes not.
On that basis, Fitzhugh's would therefore be a blue and white livery (as opposed to the blue and yellow of his arms), with a red beaked and legged raven (a play on Ravensworth) as his badge (very similar to Lord Scrope's in other words).
Lord Greystoke I can't really help with... other than suggesting an ape perhaps.