1. Computing

What is the RGB Color Model?

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Alter existing color of PowerPoint graphic object by changing values of RGB entries

Alter existing color of PowerPoint graphic object by changing values of RGB entries

© Wendy Russell
Definition:

RGB stands for Red, Green, Blue. By mixing the three colors in different increments of each color, a new color is the result.

RGB is a color format used for output to electronic devices such as televisions and computers. Input devices that use the RGB color model are digital cameras, mobile phones and video projectors.

In PowerPoint, you can adjust the color of a graphic object or the slide background color) by modifying the values of either red, green or blue or any combination of them.

This example will show how to adjust the color of a graphic object and is done in the following manner.

  1. Right click on the graphic object on the slide to select it. A shortcut menu of options will appear.
  2. Choose Format Shape.... The Format Shape dialog box will appear.
  3. Select Fill in the left pane if it is not already selected.
  4. In the Color section, click the paint bucket icon to reveal color options.
  5. Choose More Colors....
  6. Click on the Custom tab if it is not already selected.
  7. Make sure that the Color model: is set to RGB. If not, click the drop down arrow beside the current selection and choose RGB.
  8. Note the entries for Red, Green and Blue listed beside each of those colors.
  9. Type in specific numbers or adjust the entries using the up and down arrows beside each color.
  10. When you achieve the desired color, which is shown in the preview box, click OK to apply and close the Colors dialog box.
  11. Click the Close button to close the Format Shape dialog box.

A different color model used in onscreen presentations is the HSL color model. HSL is an acronym for Hue, Saturation and Lightness (or Luminosity).

Examples:
Mary changed the colors of the bars in the column chart by editing the RGB color values.

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