This website is really cool. It allows you to just drag the three colors Red, Green and Blue and adjust their concentration and it will suggest a good contrasting color scheme. This is very helpful for creating websites or dashboards for work. It takes the guessing game out as to what the contrasting colors would be with the help of the preview section shown to the left.
I had to look around today for a Hex color code to change the default color of a hyperlink on my blog today and ran across this sight and thought it was worth noting. It makes finding a hex color super easy!