I love effect when some element on grayscale photo is highlighted using bright color, for example lips or eyes color on the face, without changing element texture. I want to show how to do this in Adobe Photoshop CS2.

First we will open photo in Photoshop, discolor it using Image/Adjustments/Desaturate:

Using Polygonal Lasso tool will select area, which will be painted over, but previously set Feather value to 1px to get avoid sharp edge of lips:

Now will select Brush tool and set following options:

I choosed following foreground color for the lips: BC2805. Then I painted over lips and removed selection. We can enlarge brush size and paint cheeks a little using the same color. We got attractive girl with red lips: