.circle
{
width:76px;
height:76px;
border-radius:150px;
font-size:40px;
line-height:76px;
text-align:center;
}

.good
{
background:#009966
}

.moderate
{
background:#ffff33
}

.unhealty_group
{
background:#ff9933
}

.unhealty
{
background:#cc0033
}

.very_unhealty
{
background:#cc0033
}

.hazardous
{
background:#7e0023
}

.text_black
{
color:#000000
}

.text_white
{
color:#fff
}