A029G11

Guide:

#container
{
background-color:rgba(209, 226, 250, .5);
}

in other words:

#container
{
background-color: rgba(red, green, blue, alpha);
}

For example:

rgba(255, 0, 0,1) is red

rgba(0, 255, 0, 1) is green

rgba(0, 0, 255, 1) is blue

alpha (transparency) takes values from 0 to 1, therefore

rgba(255, 0, 0,1) is fully opaque (not transparent)

rgba(255, 0, 0,.5) is 50% transparent

rgba(255, 0, 0,0) is fully transparent

What was used:

background-color:#2d5b11;

background-color:rgb(255, 155, 0, .5);

background-image:url(images/nabel2.png);

@keyframes contain
{
from
{
margin-top:600px;
}
to
{
margin-top:10px;
}
}