ColourMeister - Reference colour

    Colour-Space Rulers are printed three dimension colour ramps with measured values of colour
in a particular colour-space. They are an excellent visual reference when manipulating and correcting colour in CMYK, Lab, HSB and RGB i.e. a HSB Colour-Space Ruler gives visual testimony to how saturated a hue will be at a saturation level of 20 when at a brightness of 50.

		Composed of the four additive primary colours of cyan, magenta, yellow and black – 'CMYK' is the predominant colour-space used for the printing industry.
		Composed of the three subtractive primary colours of red, green and blue – 'RGB' is the predominant colour-space used for non printed matter. This includes monitors, scanners and other photographic equipment.
		Composed of the three colour measurements of Hue, Saturation and Brightness – 'HSB' is one of the predominant colour-space used in colour correction.
		Composed of the three colour measurements of 'L' – lightness, 'a' – from aqua green to pink and 'b' – yellow to blue. 'Lab' is one of the predominant colour-spaces used in colour correction.