Designed a logo and made it use P3 gamut following this guide. Makes a huge difference on displays that support it.

:root {
    --bright-green: rgb(0, 255, 0);
}

@supports (color: color(display-p3 1 1 1)) {
    :root {
        --bright-green: color(display-p3 0 1 0);
    }
}