1. Open a new document, any size - fill the background with (#004477) note i used (200x200 for the size)
2. Now click Filter > Sketch > Halftone Pattern and enter these values: (size:1; contrast:5; pattern type:dot).
3. Now we use grain to get the jean effect - click Filter > Texture > Grain again.. follow and enter these values: (intensity:100; contrast: 38; grain type: regular).
4. Now it looks all crappy to be blunt, to fix this we use a simple solution of hue/saturation so hold and press ctrl + u enter the following values into the popup window.
5. Our final result:
