Try;
local r,g,b,a = v:Team():GetColor()
local ThisTeamColor = string.format( "Color: R=%i G=%i B=%i A=%i" , r, g, b, a )
ULib.tsay(ply, ThisTeamColor )
Though concatenation (using periods to separate strings and lua variables .. var .. var ..) is fine for quick little tests, I suggest reading a tutorial explaining the different string.format functions.