A value from 0 ot 255 specifying the intensity of the blue component of the screen color.
Higher values mean the color has more blue.
The following displays the value of screencolorblue in a text stimulus:
<text sometext>
/ items= ("screencolorblue = <% block.someblock.screencolorblue %>")
</text>
The following displays the value of screencolorblue in an instruction page:
<page somepage>
screencolorblue = <% block.ablock.screencolorblue %>
</page>