saas-one/frontend/operation-web/ext/classic/theme-neptune/sass/etc/mixins/background-gradient.scss

@function linear-gradient-glossy-button($direction, $bg-color) {
    @return linear-gradient($direction, color_stops(
        mix(#fff, $bg-color, 10%),
        $bg-color 50%,
        mix(#000, $bg-color, 5%) 51%,
        $bg-color
    ));
}

@function linear-gradient-glossy-button-over($direction, $bg-color) {
    @return linear-gradient-glossy-button($direction, $bg-color);
}

@function linear-gradient-glossy-button-pressed($direction, $bg-color) {
    @return linear-gradient($direction, color_stops(
        $bg-color,
        mix(#000, $bg-color, 5%) 50%,
        $bg-color 51%,
        mix(#fff, $bg-color, 10%)
    ));
}

@function linear-gradient-glossy-button-disabled($direction, $bg-color) {
    @return linear-gradient-glossy-button($direction, $bg-color);
}