This layer is defined with a <LAYER> tag.
You see that the background color is applied to the rectangular region occupied by the layer. The height of the colored area is determined by the height value.
This layer is defined in CSS syntax.
The style definition sets the position and background color, but doesn't set any values for border characteristics.
This layer is defined in CSS syntax. The style definition includes a value for border-width. The height of the colored area is determined by the actual content.
This layer is defined in CSS syntax. The style definition includes a value for layer-background-color. The height of the colored area is determined by the height value.