Strange CalendarEvent colors in Calendar

I’ve been able to stylish CalendarEvents adding the following code:

[code]
$color1: #c8eaf4;
$color2: #66FF66;
$color3: #FF9900;
$color4: #FF3300;
$color5: #FF66FF;

@mixin planes_estilos {

// Color 1
.v-calendar .v-calendar-event-color-evento1{
    background-color: $color1;
}

.v-calendar .v-calendar-event-color-evento1 .v-calendar-event-caption {
    color: black;
    background-color: $color1;
}

.v-calendar .v-calendar-event-color-evento1 .v-calendar-event-content {
    color: black;
    background-color: $color1;
}

// Color 2
.v-calendar .v-calendar-event-color-evento2{
    background-color: $color2;
}

.v-calendar .v-calendar-event-color-evento2 .v-calendar-event-caption {
    color: black;
    background-color: $color2;
}

.v-calendar .v-calendar-event-color-evento2 .v-calendar-event-content {
    color: black;
    background-color: $color2;
}

// Color 3
.v-calendar .v-calendar-event-color-evento3{
    background-color: $color3;
}

.v-calendar .v-calendar-event-color-evento3 .v-calendar-event-caption {
    color: black;
    background-color: $color3;
}

.v-calendar .v-calendar-event-color-evento3 .v-calendar-event-content {
    color: black;
    background-color: $color3;
}

// Color 4
.v-calendar .v-calendar-event-color-evento4{
    background-color: $color4;
}

.v-calendar .v-calendar-event-color-evento4 .v-calendar-event-caption {
    color: black;
    background-color: $color4;
}

.v-calendar .v-calendar-event-color-evento4 .v-calendar-event-content {
    color: black;
    background-color: $color4;
}

// Color 5
.v-calendar .v-calendar-event-color-evento5{
    background-color: $color5;
}

.v-calendar .v-calendar-event-color-evento5 .v-calendar-event-caption {
    color: black;
    background-color: $color5;
}

.v-calendar .v-calendar-event-color-evento5 .v-calendar-event-content {
    color: black;
    background-color: $color5;
}

...

}
[/code]Unfortunately, this is what I see in my web browser (chrome):

Do I miss something else in my SCSS file?

Thanks in advamce