A more sophisticated approach would need to address trapping and overprinting.įor Inkscape to be accepted in the print world, there must be good reliable support for both RGBA and CMYK color spaces. PostScript handles this readily with the /DeviceN color space, whereas output to PNG would involve masking occluded artwork. The second problem is generating PostScript or png with the colours separated correctly. The only work is at the interface and colour lookup phase - implementing schemes or palettes solves this straight off. This is easy - just represent the spot colours with their rgb approximations. There are two different problems: firstly, displaying a composite image composed of several spot colours. RGB and CMYK colorspaces defined by ICC profiles.So, off hand it seems that it would be good if Inkscape would support: The main thing about these is that they are supposed to be fixed single colors of a known appearance. Many designers (and thus users of vector art packages) often specify spot colors that are precise matches from a book, such as Pantone named colors. As a working space for artwork not targeted exclusively at web browsers, sRGB is a poor choice due to its limited gamut.Īnd then there are spot colors. Adobe and HP created this color space to model the behavior of a typical computer monitor so that in the absence of any color management, the raw RGB values piped to your display hardware will appear more-or-less as the designer intended. FOGRA or SWOP), or a custom profile tailored to a particular printer and output medium.Ī common color space for the Internet is sRGB. This same technique for displaying a graphic is used if your graphic is defined in the Adobe RGB 1998 color space, a CMYK colorspace defined by a print industry standard profile (e.g. Your monitor's profile is then used to convert the La*b* tuple to the RGB tuple that will be delivered to your monitor. The sRGB profile is used to convert the RGB tuple in the document into a La*b* tuple. To illustrate how this works, consider the case where you need an sRGB graphic displayed on your profiled LCD monitor. These are known as profile connector spaces. In ICC profiles, well-defined colors are defined in either the La*b* color space or the CIEXYZ color space. In software, this is commonly achieved through the use of an ICC profile. But in order to get precise, and to enable the same color to be seen on different computers, the general idea of color spaces comes into play.Ī color space determines how a tuple of data values (e.g., an RGB triplet) maps to a well-defined color (and vice-versa). In Inkscape, color is basically RGB value triplets.
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