When you are drawing a picture, there is a row of colors at the top of your drawing that you can choose from. To the right of that list is a plus sign, and if you click on it, that will show you new color packages that you can purchase (with game coins). Clicking on one of those packages will buy it, if you have enough coins.
In order to get more colors then the original Black, Yellow, Red and Blue. You will need to use the coins that you receive, to obtain and buy new colors.
When guess a drawing correctly you get one coin, two, or three. You can use the money to buy bombs, which I think is a waste or to buy colors which I think you should buy.
You buy them with your money.
You buy a ruler and a pencil at a store and you draw something
You can use any colours you'd like, as it is an expressionist portrait. Play with it and find something you like!
Some quests where you have to draw something, usually with charcoal. you can buy both of them on Karamja.
Red and yellow. That is why McDonalds and In-n-Out are these colors, to draw your eye.
buy one then draw it
You can download Draw Something from the iPhone or Android app stores.
You get something to draw with and something to draw on and DRAW
Draw a circle
From what i hear, draw something does not require wifi.