Create a new layer then fill with black. You must fill the background with black; this will not work on a transparent layer.

Select white as the foreground color then click anywhere to add the splattered paint.

Choose Image > Adjustments > Hue/Saturation. Checkmark the colorize option then adjust the settings to get the color that you like.

In the Styles palette (Window > Styles), click on the flyout menu on the top right then choose Load Styles.

Click on the Black Background layer style. This will make the black areas of the layer transparent; just like using a brush.

