I don't know what colour that sword is, but if it was green, the maximum you can get is purple.
White recipies have the highest probability of ending up white. They also have a 40%(?) chance to wind up green, and an even less chance (12.5%) to end up blue.
If the recipe is green, like your sword, the maximum it can go to would be purple. Don't quote me on this one, but i'm fairly certain than even though the recipe is aof higher calibur, the refining colour chance lowers through the ranks.
If the recipe is blue, it can be orange.
And finally, for those purple recipies, the item may be brown.
Note: Say you have a white recipe, and you have a 40% chance to get a green item, and a 12.5% chance to get a blue. That does not mean that if you farm 100 of that item, you will end up with 40 greens, 12 blues, and 48 whites. It just means that for each individual item you craft, you'll have the same chance over and over again. So, you could end up with 99 blues and one white, or all whites. Depends on luck of the draw. Good luck!