jellyfin-web/dashboard-ui/bower_components/emby-webcomponents/alphapicker/style.css

.alphaPicker {
    text-align: center;
    display: flex;
    flex-direction: column;
}

.alphaPickerRow {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: row;
}

.alphaPicker.vertical .alphaPickerRow {
    flex-direction: column;
}

button.alphaPickerButton {
    min-width: initial;
    margin: 0;
    padding: .1em .4em !important;
    width: auto;
    border-radius: .1em;
    font-weight: normal;
    opacity: .25;
}

.vertical .alphaPickerButton {
    padding: .25em .4em !important;
}

.layout-desktop .alphaPickerButton {
    opacity: .7;
}

[is=paper-icon-button-light].alphaPickerButton {
    opacity: .25;
    width: 4.4vh;
    height: 4.4vh;
}

.alphaPickerButton.selected {
    color: #000;
    background-color: #bbb;
    opacity: 1;
}

.alphaPickerButton:focus {
    background-color: #52B54B;
    opacity: 1;
    color: #fff;
}