The seamless web page background your created in the last tip (Creating seamless background images) was quite drab. Now we shall put a little color to it to make it that "beautiful seamless web page background"!
Open the file in Paint Shop Pro.
Click on Color - Colorize.... The Colorize window pops up.

Choose the settings for Hue and Saturation. Saturation affects the amount of color in the image while hue lets you pick a color.
Experiment till you get the desired result.
Decrease the color depth in the image ... click Color - Decrease color depth and select 16 colors (4 bit). Alternatively, you can use the keys SHIFT-CONTROL + F2.

I set Hue at 150 and saturation at 34 to get a blue color. Check the background here.
Page contents: Web page background images should ideally be seamless so that you can use a small image that can tile to create a larger background image effect.
Comments, questions, feedback... whatever!