The parameter colorspace can be gray, rgb, cmyk, spot or pattern.
Set the current color space and color. The parameter type can be "fill", "stroke", or "both" to specify that the color is set for filling, stroking or both filling and stroking. The parameter colorspace can be gray, rgb, cmyk, spot or pattern. The parameters c1, c2, c3 and c4 represent the color components for the color space specified by colorspace. Except as otherwise noted, the color components are floating-point values that range from 0 to 1.