I'm pretty sure that lots of players are trying, as I am, to complete the whole map exploration, and even if I didn't believe when I read that the hardest part could be WvWvW, I must change my mind, it is really hard, due to the team colour allocation of servers…
Being more specific, I'm on Whiteside Ridge and it's like since 2/3 months that I go to WvWvW at least once a week, to be sure to catch up every new match, and so every new colour… but we never been (as far as I started to do it) in the green team, making it quite impossible to break through enemy lands to complete my last map exploration.
So now, to the question, how is the colour assigned to the three matched servers? Is it statically given based on the leaderboard position? Like 1st, 4th, 7th and so on always green, 2nd, 5th, 8th and so on always blue and the other ones always red? Or is there a chance that even if the leaderboard will not change, my server could finally switch to green?
is the most common form of currency accepted by NPCs and is the basis for player
trade. It can be obtained via loot or as rewards for completing events
or completing achievements.
are used to purchase items from the in-game store; they can be exchanged or traded for coin.
is used to unlock skins for use in Structured PvP; it can only be obtained through participation in that
game mode.
can be spent on guild upgrades and boons; it is earned when players representing a guild participate
in events, PvP, personal storyline. A guild's accumulated influence
can be seen via the guild panel (G).
is used to purchase special items from designated NPCs; it cannot be traded and
must be earned by participating in dynamic events, helping others with
their personal storylines, or completing dungeons.
are used to unlock new skills and Miyani will take them in exchange for mystic items or
recipes.
is acquired through and used in WvW to build structure upgrades and siege weapons.
are earned by completing dungeons. Dungeon Merchants will accept them in exchange for items unique to
that dungeon.
Best Answer
Your server's WvW colour (i.e. green/blue/red) is determined by your current matchup and rank. As you suspect, the top team in each set of three currently gets assigned to green, the second to blue, and the third to red (currently this happens weekly). The reasoning behind this is that red is (only ever so slightly, since the three Borderlands maps are identical and the Eternal Battlegrounds are very similar for all three sides) easier than blue while green is (ever so slightly) harder.
To see your current position and likely next position, you can have a look at http://mos.millenium.org/matchups#NA which is updated regularly with scores and has more information than ANet's own leaderboards.
The good news is that plans were recently announced on the forums to rotate the colours more often, which will allow you to more easily explore WvW from a different starting point (of course, being WvW, there are no guarantees that anyone will be in control of specific areas at any given time). As Devon Carver states in a later post in the same thread, "While [world completion] would certainly be a side effect of the change, I’d like to do it because it will add a small amount of variety to the matchups, nothing more and nothing less."
To address your concern in your comment to your question, there is nothing you need to "discover" for world completion that depends on which Borderland is yours. The only thing in areas reachable for only one team are waypoints, but since they're all marked as discovered by default, nothing is unreachable. Of course some POIs and vistas require access to certain garrisons etc., so you'll have to hope your side captures them unless you're willing to switch servers.