This one goes for designers who try to figure out which colour combination would be best if they are out to design applications or websites. Swatch Spot is an online tool which generates swatch or strip of 6 colours which goes with each other.
And if you did like the combination you can save the pallets to your personal pallet library in your computer and use it as in Image. Since each colour has its hexadecimal values along with it you dont have to run around picking each colour to see what it meant.
Related : Colorblender : Add color palette to Photoshop, illustrator and more