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@@ -371,11 +371,10 @@
         </p>
 
         <p>
-          I later learned that I had rediscovered the
-          <a href="https://www.lambdoma.com/">Lambdoma</a>, so called by the
-          ancient Greeks for its resemblance to the letter Lambda. The synergy
-          of color and sound in the Lambdoma, linking the octave to the color
-          wheel, was first studied in depth by artist and sound practitioner
+          I later learned that I had rediscovered the Lambdoma, named for its
+          resemblance to the Greek letter Lambda. The synergy of color and sound
+          in the Lambdoma, linking the octave to the color wheel, was first
+          studied in depth by artist and sound practitioner
           <a href="https://www.lambdoma.com/barbara-hero.html">Barbara Hero</a>.
           Hero made the Lambdoma her life's work, and built an 8x8 electronic
           Lambdoma instrument for sound healing purposes.
@@ -414,14 +413,27 @@
 
         <p>
           With the root, fifth, and fourth in the top-left corner, the Lambdoma
-          shows how the 3:2 proportion is essential to the perception of
-          consonance. The musical circle of fifths, derived from these simple
-          proportions, can be studied in more detail in this program's
-          Pythagorean scale mode. Similar notes can be found by color and
-          compared. One can easily hear how stacked fifths overshoot the octave
-          by finding two far-apart red notes and playing both at once, which
-          makes them beat against each other. This interval is the "syntonic
-          comma" which is averaged out in various keyboard tuning systems.
+          shows how the 3:2 proportion is essential to human perception.
+        </p>
+
+        <p>
+          Mapping colors logarithmically to this wheel of fractions, with red at
+          the octave (1:1), it naturally follows that the fourth (4:3) is green,
+          and the fifth (3:2) is blue. These ratios seem to correspond to the
+          photoreceptors in the human retina, which are sensitive to wavelengths
+          of light in three different ranges: long, medium, and short. These
+          ranges are perceived as "red, green, and blue" in the brain; our
+          mind's eye sees a continuous cycle of color that loops back on itself.
+        </p>
+
+        <p>
+          The musical circle of fifths, derived from these simple proportions,
+          can be studied in more detail in this program's Pythagorean scale
+          mode. Similar notes can be found by color and compared. One can easily
+          hear how stacked fifths overshoot the octave by finding two far-apart
+          red notes and playing both at once, which makes them beat against each
+          other. This interval is the "syntonic comma" which is averaged out in
+          various keyboard tuning systems.
         </p>
 
         <p>