style.css

html, body {
  margin: 0px;
  height: 100%;
}

#sidebar {
	grid-area: sidebar;
	overflow-y: scroll;
}

#content {
	grid-area: content;
}

#toolOptions {
	grid-area: toolOptions;
	overflow-y: scroll;
	max-width: 200px;
}

.toolOption{
	max-width: 30px;
	padding: 5px;
}

.header {
	grid-area: header;
	font-family: Helvetica, sans-serif
}

.footer{
  grid-area: footer;
}

.sideBarItem{
	max-height: 50px;
	max-width: 50px;
	padding:5px;
}

.sideBarItem img{
	max-height: 50px;
	max-Width:50px;
}


.colourPalette{
	grid-area: colourP;
	display:flex;
	flex-direction:grid;
	flex-flow: wrap;
}

.options{
	grid-area: options;
	padding: 15px;
}

.colourSwatches{
	box-sizing: border-box;
	width: 40px;
	height: 40px;
	max-height: 40px;
	max-width: 40px;
	margin: 5px;
}


	.wrapper {
		display: grid;
		height: 100%;
		grid-template-columns: 70px 230px  minmax(500px, 1fr) 200px;
		grid-template-rows: 35px minmax(500px, 1fr) 160px;
		grid-template-areas:
               "header header header header"
				"sidebar content content toolOptions"
                "colourP colourP options options";
		background-color: #fff;
		color: #444;
	}
.box {
  background-color: #444;
  color: #fff;
  font-size: 150%;
}

.header {
  background-color: #999;
}