How to Remove Slider Opacity in Hestia

If you don't like the background opacity and want it to be clear then you can add the following CSS to your WordPress. In case you don't have a CSS plugin, we advise you install  Advanced CSS Editor plugin and follow the instructions. In Appearance -> Customize -> Advanced CSS Editor add the following code:

.header-filter::before {
    background-color: rgba(0, 0, 0, 0.30) !important;

If you don't want to remove it, then you can also adjust it by changing the value to something like: rgba(0, 0, 0, 0.30).

If you are using WordPress 4.7 or later you could add the code to Appearance->Customize->Additional CSS