do double lands count as colored permennts

[NIKTER]

does a double land count as a colored permanent?

[DatAsh]

No, lands have no colours unless stated otherwise.

[DatAsh]

Note the description of Dryad Arbor on magiccards.info:
Dryad Arbor
Land Creature — Forest Dryad 1/1
(Color Indicator: Green)
(Dryad Arbor isn't a spell, it's affected by summoning sickness, and it has "{T}: Add {G} to your mana pool.")

Then say... Temple Garden:
Land — Forest Plains
({T}: Add {G} or {W} to your mana pool.)

As Temple Garden enters the battlefield, you may pay 2 life. If you don't, Temple Garden enters the battlefield tapped.

Note the lack of colour indicator?

[NIKTER]

not sure what you are getting at?

[DatAsh]

Really? My point is that lands do not have colour indicators, with the one exception that is Dryad Arbor. This includes all dual lands.

[Kenji]

What he's getting at is this: a card's color is determined by one or more of the following:

1. Mana symbols in its mana cost
2. Color indicators, and/or
3. Characteristic-defining abilities

If a card has no color symbols in its mana cost (perhaps because it has no mana cost), and it has no color indicator, you can infer (correctly) that said card is colorless.

Dryad Arbor is green. Why? Because its color indicator says so.

Temple Garden is colorless. Why? Because it has no mana cost, and has no color indicator. The fact that it produces colored mana has no bearing whatsoever on the card's colors, or lack thereof.

Edit - As an added bonus, excerpt from the Comprehensive Rules that deals with this:

105.2. An object can be one or more of the five colors, or it can be no color at all. An object is the color or colors of the mana symbols in its mana cost, regardless of the color of its frame. An object’s color or colors may also be defined by a color indicator or a characteristic-defining ability. See rule 202.2.
105.2a A monocolored object is exactly one of the five colors.
105.2b A multicolored object is two or more of the five colors.
105.2c A colorless object has no color.