I’m not sure I understand, but in a Fusion (18.0.6) project, when I add a Select (like the first example [here]
(https://vaadin.com/docs-beta/latest/ds/components/select/)), give it a theme attribute: theme="my-styled-select"
, and I add the following style to shared-styles.js
[theme='my-styled-select']
vaadin-item[selected]
{
background-color: yellow;
}
The selected item has a yellow background alright