Though the feature may not be of any use to laymen, its a great feature for techies.
If youre unfamiliar, RGB and Hex are both color spaces used to identify colors.
For example, #000000 in Hex and (0,0,0) in RGB both refer to Black.
Searching RGB to Hex brings up a simple color picker that shows results in RGB and Hex.
you might search any Hex or RGB value, and it will show the color in both formats.
For example, rgb(0,0,0) and #000000 show the same result.
This seems to work in both the Google search app, as well as the desktop search.
Perhaps a small addition, but a welcome one.
source: www.techworm.net
