CSS style for disabled ComboBox

Hi everyone,
How to make ComboBox when disabled be like a Label
(w\o border and combo button).

I tried something like that but it doesn’t work:(
.v-filterselect.v-disabled.disabled .v-filterselect-input.v-disabled.disabled {
border: none;
opacity: 1;

.v-filterselect-no-button.v-disabled.disabled .v-filterselect-button.v-disabled.disabled {
      display: none;

I just checked that with Designer you can find stylename borderless for ComboBox, I think you should use that one. I.e. something like you are looking for is built in Valo theme.