The value (0 to 255) of the blue component of a shape's color.
<shape>
The following displays the value of colorblue in a text stimulus:
<text sometext>
/ items= ("colorblue = <% shape.circle.colorblue %>")
</text>
The following displays the value of colorblue in an instruction page:
<page somepage>
colorblue = <% shape.circle.colorblue %>
</page>