How do I make an image black in PowerPoint?

How can I change the color of an image?

Use the Replace Color dialog box

  1. Choose Image > Adjustments > Replace Color.
  2. (Optional) If you are selecting similar, contiguuous colors in the image, select Localized Color Clusters to build a more accurate mask.
  3. Select a preview option:

How do I convert a color image to grayscale?

Change a picture to grayscale or to black-and-white

  1. Right-click the picture that you want to change, and then click Format Picture on the shortcut menu.
  2. Click the Picture tab.
  3. Under Image control, in the Color list, click Grayscale or Black and White.

How do I convert color to grayscale?

You just have to take the average of three colors. Since its an RGB image, so it means that you have add r with g with b and then divide it by 3 to get your desired grayscale image.

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