About color modes and models in Photoshop

A color mode determines the color model used to display and print images. Photoshop bases its color modes on established models for describing and reproducing color. Common models include HSB (hue, saturation, brightness); RGB (red, green, blue); CMYK (cyan, magenta, yellow, black); and CIE L*a*b*. Photoshop also includes modes for specialized color output such as Indexed Color and Duotone. ImageReady uses RGB mode to work with images.

In addition to determining the number of colors that can be displayed in an image, color modes affect the number of channels and the file size of an image.

 You can set up the Info palette so that you can select any tool, position the pointer over any part of an image, and determine the color value under the pointer. You can customize the Info palette and color samplers to express color values using HSB, RGB, CMYK, Lab, or Grayscale modes without changing the mode of the image itself.and the procedure to change Info palette options in Using the Info palette (Photoshop).

Blending filter effects in Photoshop

The Fade command changes the opacity and blending mode of any filter, painting tool, erasing tool, or color adjustment. The Fade command blending modes are a subset of those in the painting and editing tools options (excluding the Behind and Clear modes).

Applying the Fade command is similar to applying the filter effect on a separate layer and then using the layer opacity and blending mode controls.

Note: The Fade command can also modify the effects of using the Extract command, Liquefy command, and Brush Strokes filters.

To fade the effect of a filter, painting tool, or color adjustment:

1. Apply a filter, painting tool, or color adjustment to an image or selection.
2. With the affected area still selected, choose Edit > Fade.
3. Select the Preview option to preview the effect.
4. Drag the slider to adjust the opacity, from 0% (transparent) to 100%.
   
5. For Mode, choose a blending mode.
6. Click OK.
Note: The Color Dodge, Color Burn, Lighten, Darken, Difference, and Exclusion modes do not work on Lab images.

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.