On the Swatches panel, select a palette from the palette pop-up menu. To save a colour or gradient to a palette: See 'Colour palettes' in the Help and screenshot below. Would be great to have the ability to create folders and add your own swatches like in illustrator.

While it might be a nice option to be able to configure a document palette such that all colors added to it are forced to the document color space, the flexibility of being able to mix color spaces is a good thing in general and adds the flexibility of being able to prepare documents for those high-end output devices. Some of those presses (again using the example of the HP Indigo) can also mix in specialized spot color inks that would also need to be included in the document, for metalic or other effects to be added to the final document, so it is not just CMYK and RGB either. If matching a color from an RGB photo, that particular color might need to remain RGB as the printer might handle the RGB differently and give it a slightly different mix of inks when printing than the CMYK would get, so if the document contains a combination of CMYK elements and RGB elements, then a mixture of different colors on the document palette is correct and desirable. With printers that use more than four colors of ink (HP Indigo digital presses for example), forcing everything to CMYK would actually limit the quality of the final output because colors which are in the photo may be reproducible by the printer but would be lost in the process of preparing the document to be sent to those printers. The reason is that modern high-end printers will treat colors differently if they are in the different color spaces, and the RGB color space can handle a wider range of colors that cannot be accurately represented in CMYK. It is perfectly valid that documents may contain a mix of different color spaces - for example, vector design elements might be in CMYK while photos taken with cameras might be in RGB - and if the designer wants to match a color to something from one of those photos, maybe a frame or something, it might be best to stick with RGB for that color.

Corel color palette empty