Originally Posted by jclements
Coming from an untrained background in regards to color/color space, I find Charle's comments dead-on about the UN-intuitiveness of the RGB sliders. [I do remember watching an experienced designer (unexperienced in Xara) using Xara's RGB sliders and also typing in values directly to adjust hues; it was a pretty humbling experience for me.]
When I first started using Xara, I didn't pay my attention to HSV so I used the CMYK model sliders because they WERE so INTUITIVE. Having K available for darkening things up was convenient (with more experience, I'd play with using darker mixes of C, M, and Y and not touching the K values).