Using The Color Picker

Hello,
To display Adobe's Color Picker, click on either the foreground or background color in the toolbox. The color picker dialog box, shown below, allows you to select a very specific shade, either by visually choosing it or by defining the color numerically.

Visually - The initial white circle is the current color. Drag the little triangles on the vertical color slider to change the range of colors displayed, then click on the desired shade to select it.
Numerically - Enter the correct color code in the RGB, CMYK, HSB, Lab, or Hexadecimal (Web) text boxes.

When the 'ONLY WEB COLORS' box is checked in the bottom left - hand corner of the dialog box, Photoshop will only display colors that will properly display on the World Wide Web:

When you are satisfied with your selected color, click the OK button to return to the image.

Pull down the Book menu to select the desired color system. Scroll though the available colors using the color slider on the right, then click on the color you want. Click OK to return to you image, or click Picker to return to the Adobe Color Picker dialog box.

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Creating A New Image And Color Section

Hello,
To create a new image, select File -->New, or press N
A dialog box pop up prompting you to define five general elements for creating a new image.

* Name the image now. (or later, when you save the image)
* Predetermine the size of the image

* A resolution of 72 ppi (pixels per inch) is generally used for Internet purposes.
Anything higher than that can be used for images requiring high quality, such as
those required for print or video.

* In our working, we'll stay with the RGB (Red Green Blue) color mode, which
offers general colors. There are also other preset odes that offer difficult
schemes such as grayscale.
* The contents section allows you to decide what will be the initial background color of the new image. (Set to Transparent or to White)
Before we start drawing or editing we should first learn about the color selections in Photoshop :
Understanding Color Selection

Color selection is the act of picking the color that you want to use as a part of your image.At a time, Photoshop remembers two colors for you: the foreground color and the background color. The foreground color is used to make gradients and fill in the erased areas of an image.
There are several ways in Photoshop to change the foreground and background colors, we'll cover the most common methods here.
USE THE DEFAULT COLORS. Clicking the 'set default colors' button on the toolbox. This will set the foreground color to black and the background color to white.
SWAP THE BACKGROUND AND FOREGROUND. Clicking the small curved arrow on the toolbox will reverse the foreground and background colors.
USE THE EYEDROPPER TOOL TO SAMPLE A COLOR. The eyedropper tool, located on the toolbox, allows you to simply click on a color in an open image to select it as the foreground color.To set the background color, hold down the ALT key when you click. When using a painting tool, you can temporarily turn the cursor into the Eyedropper tool by holding down the Alt key. When you release the Alt key, the cursor turns back into the previous panting tool.