adjust background colors

[Mariusthvdb]

to 'official' style sheet:

    .aqi-green {
        color: #607631;
        background:#a8e05f
    }

    .aqi-orange {
        color: #974a20;
        background:#ff9b57
    }

    .aqi-yellow {
        color: #8c6c1d;
        background:#fdd64b
    }

    .aqi-red {
        color: #942431;
        background:#fe6a69
    }

    .aqi-purple {
        color: #543b63;
        background:#a97abc
    }

    .aqi-maroon {
        color: #573344;
        background:#a87383
    }