Kenneth Lee Gallery
GIMP Colorize Tool


Step 1 - Make sure your image is RGB.

Select Image > Mode > RGB

GIMP Colorize Step 2 - Open up the Colorize Tool

Select Colors > Colorize

GIMP Colorize

Step 3 - Choose your color

Specify Hue to get the color you want.
Specify Saturation to get the intensity of color.
Leave Lightness at 0 to preserve the tonal scale.
Toggle the Preview option to compare with original.

GIMP Colorize

Now click on the OK button.

All Done!

Get GIMP

Visit the GIMP web site here
 
Photoshop Users

The Photoshop provides several ways to do the same thing. For instructions, see Toned Monochrome Images with Photoshop.
 
More Information

For more technical info, click here.