.colourscaleSvgWrapper {
	position: relative;
	height:0;
	padding-bottom: 94%;  depends on svg ratio, for colourscale height/width = 545/580 = 0.94*/
}

.colourscaleSvg {
	display: block;
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
}