Because people keep on asking me from time to time how I blend colors in Photoshop or any other painting software. This tut is using two tooltips you are can to find in nearly any painting software:
- a brush with perhaps 80% opacity
- the eyedropper to pick up color from the canvas

Step 1:
. prepare your colors you want to blend

Step 2:
- use green to make a stroke over blue and pick up the new color using the eyedropper

Step 3:
- use the new green to paint over the edges and pick the new color again

Step 4:
- repeat step 2 and 3 until evrything is nice and smooth

Step 5:
- be happy about your results!