rent (illustrated by a solid
checkerboard pattern).</p>
<p>The horizontal and vertical bars in these images show the red, green, and
blue channels with varying opacity levels, then all three color channels
together with those same varying opacity levels, then all three color
channels set to zero with those varying opacity levels, then two bars showing
a red/green/blue repeating gradient, the first with full opacity and the
second with partial opacity, and finally a bar with the three color channels
set to z