Set background color dialog

• Use Color Selector button

  Opens up a color dialog which can be used to select a different color for the left panel.

• Define a color range button

  Use this option to specify a range of colors. The start color for the range will get displayed on the left panel and the end color in the right panel.
  The end color can be changed by varying the Luminosity and Saturation levels. A color can be defined in terms of it's Hue, Saturation and Luminosity. Hue is the base color. By varying the saturation, we can obtain different shades of the color while by varying luminosity we can make the same color appear darker or lighter.
  
  Note that the left pane color cannot be changed once you hit the button (To change it click on the cancel button and start afresh).

• Sat (Saturation)

  This option gets enabled after we click on the Define a color range button. It consists of a radio button and a vertical scrollbar. Once the radio button is checked, the vertical scrollbar above is enabled. We can move it to vary the saturation for the color on the right panel. By varying the saturation, we can obtain different shades of the color.

• Lum (Luminosity)

  This option gets enabled after we click on the Define a color range button. It consists of a radio button and a vertical scrollbar. Once the radio button is checked, the vertical scrollbar above is enabled. We can move it to vary the luminosity for the color on the right panel. By varying the luminosity, we can make the color appear darker or lighter.

• Selected color

  This option is available only if we haven't clicked on the Define a color a range button. This is checked by default. If this option is selected, then only the color displayed on the left panel will be marked as background.

• Selected and all brighter colors

  This option is available only if we haven't clicked on the Define a color a range button. If this option is selected, then all colors whose brightness levels are equal to or greater than the brightness of the selected color, will be set as background.
  Use this option when your model is markedly darker than the background.

• Selected and all darker colors

  This option is available only if we haven't clicked on the Define a color a range button. If this option is selected, then all colors whose brightness levels are equal to or less than the brightness of the selected color, will be set as background.
  Use this option when your model is of markedly lighter color than the background.