As best I can find, rooting through old Forgotten Realms lore, the colours of the Tymoran church are normally blue and silver.
For my comics, I made the Tower of Luck use green as it's main colour for stuff, to mimic the green baize of gambling tables. Gold accents to symbolize wealth - since the Tower of Luck is much more focused on luck and gambling than the good fortune and karma focus that the rest of the faith normally has. It's my general intention to slip gambling references and symbology into the church whenever the characters are there.