RainbowGround is a utility for wallpaper / Web background image creation.
It produces periodic, tileable images based on user-given or randomly generated
color factor values. It can save resulting images as Web background (*.jpg)
or as Windows background (*.bmp).
At the upper left corner of the RainbowGround window there is preview area of generated image.
Sliders around it are controlling red, green and blue color factors. As you change their positions, resulting image is changing too.
At the right there are brightness and contrast sliders. They also affect resulting image.
Lock buttons are used to lock groups of sliders so that
a) all sliders in the group are linked and moved together and
b) locked sliders are not affected by Randomize button.
Randomize button changes positions of all unlocked sliders including brightness and contrast.
Small triangle buttons are Reset buttons for returning appropriate sliders to their initial positions.
The Save button serves for saving resulting image to a file.

RainbowGround is the Freeware version. The full version can be purchased by clicking on the "CLICK HERE TO ORDER" button below for around  9.95USD.