The fundamental skill of coloring interface designs is being able to modify one base color into many different variations. Many great-looking interfaces is that they often have darker and lighter variations on a particular theme color.

Darker variations:

• Brightness decreases.
• Saturation increases.
• Hue (often) shifts towards a luminosity minimum (red, green, or blue).

Lighter variations:

• Brightness increases.
• Saturation decreases.
• Hue (often) shifts towards a luminosity maximum.