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We tried to group together the more usual questions we receive about using and interpreting this site data and services. These FAQs are all related to the EasyRGB site and the way we specifically handle color information. If you are searching for more generic information about color, on the Net there are several good sites devoted to color science, physics, psychology, physiology and technology. Check our Links page for a list of handy color FAQ references.

What can I do using the services of this site?

How accurate are on-screen colors?

How are color standards measured?

How color measures are stored in the EasyRGB database?

How is the closest color (best match) calculated?

Why HLS/HSL/HSB/HSV data is not supported?

Is any gamma correction applied to the displayed colors?

Why is a 45 (not a sphere based) spectrophotometer used?

Is possible to add a new color collection to the color matching list?

What is the required color resolution for this site?

Is any compatibility problem associated with old browsers?

Why printed colors are not consistent with my monitor?

CMY and CMYK are the spaces generally used to print colors. The problem is these spaces are extremely device dependent. The kind of paper, ink, and printer technology used in the process, heavily impact the final color quality.
In this context CMY and CMYK spaces have been added to our conversion tables only because they represent very popular color information in the computer world.
The very simple transforms used to convert RGB data to CMY and CMYK, are fine just for very basic color printing. For professional application, or everywhere color presentation is critical, an accurate printer profiling (characterization of a device dependent space to a device independent one) must be used.