There are many baseline rules in web design (and design in general) around how the use of color, shape, line-quality, and font. These rules typically have some grounding in the way the brain perceives these things in relation to each other.
Can anyone point me to a good resource explaining how to use gradient fills (linear and radial)? How they affect the eye, contrast with overlaid fonts, affect the perception of color, dominance, etc?
Resources don't need to be targeted at web-design, as it probably applies to any screen-based graphical design, if not print design as well.