SC4 Water Swatch.atn

 copy the atn file to C:\Users\YourUser\Appdata\Roaming\Adobe\Photoshop\Presets\Actions
 then select using the Action Panel menu in Photoshop. If you exit with it loaded it should stay there.
 
 Select two colors 
 Foreground Color = a water + sky reflection color
 Background Color = a water color 
 run action - it will produce a 256x256 texture swatch of how colours that would appear in-game. Colors 3 and 4 are used for the side colors of the water. 