How to Choosing foreground and background colors

Photoshop uses the foreground color to paint, fill, and stroke selections and the background color to make gradient fills and fill in the erased areas of an image. The foreground and background colors are also used by some special effects filters.

You can designate a new foreground or background color using the eyedropper tool, the Color palette, the Swatches palette, or the Adobe Color Picker.  

The default foreground color is black, and the default background color is white. (In an alpha channel, the default foreground is white, and the background is black.)

How To Pick Color For Web Using Photoshop

It is a very easy way to pick color and getting color code from adobe Photoshop or adobe Photoshop cs. Get only two stapes to pick color for your webpage. That is-

 Step 1: Open your Photoshop and click on color box in toolbar.

 Step 2: Now open color box, here you click in (Only web colors) check box and choice your color. On the right side make a color code. Now you copy the color code and use it your webpage.