Accordion caption as primary button look

I am using valo theme for my procect, and I would like to make the accordion selected caption the same style as the primary button.
I tried the following:
.v-accordion-item-open .v-accordion-item-caption {
background: $v-focus-color;
border-color: $v-focus-color;
color: #fff;

But this gives me an ugly output, and does not look like primary button at all.
Any help is appreciated.