How to get a light gritty effect in a shape?

[ShadowDancer]

I can fill a square with a solid color, but I would like to give it a light gritty effect. Attached are two exemples, pink and green.
I tried to fill with patterns, but it becomes always black/white.
How can I create a background with a gritty/sandy effect in the color I wish?
Thanks in advance!

 

[LaceyKeo]

Something like these?



I cheated for the example and grabbed a white noise image (which you can make in PS IIRC via the filter menu).

The first image I laid the white noise over a plain pink background and reduced opacity and saturation.

The second I laid the pink over the white noise and set the pink later to multiply.

If these are along the lines of what you're looking for, you can mess around with the size of the white noise grain, and the opacity, to achieve the desired "gritty" feel.

 

[Rich54]

There are several ways to do this. Here's one:
1. On a new layer above your colored squares, create a selection of a square and fill it with 50% Gray (Edit>Fill>50% Gray).
2. Change the layer blend mode to Overlay, at which point your Gray layer disappears.
3. Go to Filter>Noise>Add Noise. The amount of noise you will use depends on what you want and the pixel size of your image, but try starting with 5% to 10%. (Experiment with either Uniform or Gaussian noise. I generally use Gaussian.)
4. As an optional step, apply a Gaussian Blur of maybe 1 pixel or less to get different types of textures. Also experiment with the Opacity of the layer.
5. Also as an optional step... go back to step 2 and try Hard Light instead of Overlay. Use whichever you like better.

The combinations are endless, but for the effect you're looking for, I've always found that in Step 3 you should use a little bit more noise than you think you need, and then reduce the layer opacity to get more precise with the effect you want.

Method 2:
1. Create a duplicate layer of your colored squares.
2. Go to Filter>Texture and experiment with every option available. Once you've chosen one you can modify it using a combination of Opacity and Blur, as above.

 

[polarwoc]

I have used the grain shown in a) below with the solid colour shown in b) below and used Multiply Blending mode to achieve c) and by lowering opacity of the colour layer to about 70%, I obtained d). Is this what you are asking for?

 

[ShadowDancer]

LaceyKeo, Rich54, polarwoc, thanks for your comments. Steps of Rich54 really helped to create the effect.