I've changed the fiddle based on your comments. Is this what you desire? Fiddle
*I've updated the fiddle
.container {
position: relative;
background: gray;
height: 300px;
width: 100%;
}
.container > div {
height: 100px;
width: 100px;
}
.left {
position: absolute;
left: 0;
bottom: 0;
height: 250px !important;
background: green;
}
.middle {
position: absolute;
left: 100px;
bottom: calc(50% - 50px);
background: red;
}
.right {
position: absolute;
right: 0;
bottom: calc(50% - 50px);
background: blue;
}