Replace Color
الصور واضحة بالانجليزى
   Photoshop’s Replace Color adjustment is a quick and efficient way to swap one  color for another. In this tutorial, we’ll change the  blue of the sky and the Aloha logo on these skateboards for a sunny yellow.
 
 Step 1
 Step 1
 
 Start by going to Image > Adjustments > Replace Color. Tap in the image  to select the color to replace– I always begin with the purest part of the  color. Fuzziness sets the tolerance of the Replace Color mask. Set the hue  you’re changing to with the Hue, Saturation and Lightness sliders.
 
Step 2

Next, choose the eyedropper with the plus sign to add  to the selection. Tap on any areas of blue remaining to change them to yellow.  (If you accidentally click in a spot you don’t want to change, hit  command/control-Z to undo.)
 
Step 3

When you’re finished selecting all the blue that needs  to be changed, hit the OK button. Save under a different name (yellow_aloha.psd)  to keep both the original and the replaced color boards.
 
