This is a bit lengthy, but not too difficult.
Part 1: Creating the Pattern
Create new file in Photoshop. Go to
New... or press Ctrl+N, enter the values of
Height. Until otherwise indicated, we are working in this file.
Fill the background with black. You can do this by pressing the D key to reset the selected foreground and background colors to black and white and then using Alt+Backspace on Windows or ⌥+Delete on Mac to fill the whole canvas. You should now see a canvas filled with all black.
Add noise. Go to
Add Noise... and wait for
Add Noise dialog box to appear. Set the
Amount to approximately
Distribution option does not matter (I used
Gaussian). Check the
Monochrome checkbox if it is available and click the
At this point canvas should display a grainy black & white pattern, more black than white. If you have more white than black, go back through the earlier steps and make sure you did everything precisely.
Define this image as a pattern. Press Ctrl+A on Windows or ⌘+A on Mac to select the entire canvas, then go to
Define Pattern…, and wait for
Pattern Name dialog box to appear. You can enter whatever name you like, such as
Grainy Texture for example.
You now have a pattern defined that you can use anytime when working in Photoshop. Let’s use it to create the blue texture like on the Twitter homepage.
Part 2: Creating the Effect Using the Pattern
Create new file in Photoshop. Enter your values for
Height (I used
800px respectively). We are now working in this file, not the Texture File.
Fill the background with blue-gray. Left-click on the foreground color swatch at the bottom of the
Tools Panel and wait for
Color Picker (Foreground Color) dialog box to appear. Enter
51708a as a value for the HEX text field (you will find it near the bottom-right, with a hash sign
# beside it). This value represents a blue-gray color similar to what Twitter is using, and the picker should display that color after you type in that text. Click
OK in the dialog box and press Alt+Backspace on Windows or ⌥+Delete on Mac to fill the current layer with this blue-gray color.
Pattern Fill layer with previously created pattern. Go to
New Fill Layer >
Pattern…, wait for the
New Layer dialog box to appear, enter
Texture (matte) in the
Name field and click
Wait for the
Pattern Fill dialog box to appear and make sure previously created pattern is selected. If not, click the down arrow near the preview of the pattern and choose
Grainy Texture (you can mouse-over the patterns to see their names in the tooltip).
Lower opacity and change blend mode to
Overlay for texture layer. In the
Layers Panel, you should see a menu option that says
Normal. You will need to click this and change it to
Overlay and also set the
Opacity to approximately
And that’s it. You are done: