Sprite Kit nodes with a color property don't support colors using a pattern image. It has to be a solid color, for example one you'd create with colorWithRed:green:blue:alpha:
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You should create your pattern image in an image program and add it to the bundle. If you make the pattern image grayscale you can colorize it at runtime to create various color combinations. For example a checkerboard white/black pattern image and the sprite node's color set to red will give you a black & red pattern. Adjust the sprite node's colorBlendFactor to control the "brightness" of the color component.