Choosing the colors#
The first thing to do is choose the design and background colors for the pattern. Match them to the actual yarn you're going to use.
Click the cog icon in the lower left corner and use the color pickers to set the two colors. You can move the settings dialog to one side to keep a good view of the pattern, since its colors change as you adjust the setting.
You can switch the sliders between Hue / Saturation / Value (HSV) and Red / Green / Blue (RGB).