diff --git a/test/unit/accessibility/color_namer.js b/test/unit/accessibility/color_namer.js
new file mode 100644
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+++ b/test/unit/accessibility/color_namer.js
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+/**
+ * Tests for the color namer accessibility module.
+ *
+ * The color namer provides human-readable color names for screen readers.
+ * It converts RGBA colors to HSB, then matches against a lookup table
+ * to return names like "red", "light blue", "dark green", etc.
+ *
+ * Source: src/accessibility/color_namer.js
+ */
+
+import p5 from '../../../src/app.js';
+
+suite('accessibility/Color Namer', function() {
+
+  suite('Primary Colors', function() {
+    test('red fill should produce "red" color name', function() {
+      return new Promise(function(resolve, reject) {
+        new p5(function(p) {
+          p.setup = function() {
+            let cnv = p.createCanvas(100, 100);
+            cnv.id('testCanvas');
+            p.gridOutput();
+            p.fill(255, 0, 0);
+            p.rect(0, 0, 50, 50);
+          };
+          p.draw = function() {
+            if (p.frameCount === 1) {
+              let actual = document.getElementById('testCanvasgridOutputshape0')?.innerHTML || '';
+              if (actual.includes('red')) {
+                resolve();
+              } else {
+                reject('Expected "red" in output, found: ' + actual);
+              }
+              p.remove();
+            }
+          };
+        });
+      });
+    });
+
+    test('green fill should produce "green" color name', function() {
+      return new Promise(function(resolve, reject) {
+        new p5(function(p) {
+          p.setup = function() {
+            let cnv = p.createCanvas(100, 100);
+            cnv.id('testCanvas2');
+            p.gridOutput();
+            p.fill(0, 255, 0);
+            p.rect(0, 0, 50, 50);
+          };
+          p.draw = function() {
+            if (p.frameCount === 1) {
+              let actual = document.getElementById('testCanvas2gridOutputshape0')?.innerHTML || '';
+              if (actual.includes('green')) {
+                resolve();
+              } else {
+                reject('Expected "green" in output, found: ' + actual);
+              }
+              p.remove();
+            }
+          };
+        });
+      });
+    });
+
+    test('blue fill should produce "blue" color name', function() {
+      return new Promise(function(resolve, reject) {
+        new p5(function(p) {
+          p.setup = function() {
+            let cnv = p.createCanvas(100, 100);
+            cnv.id('testCanvas3');
+            p.gridOutput();
+            p.fill(0, 0, 255);
+            p.rect(0, 0, 50, 50);
+          };
+          p.draw = function() {
+            if (p.frameCount === 1) {
+              let actual = document.getElementById('testCanvas3gridOutputshape0')?.innerHTML || '';
+              if (actual.includes('blue')) {
+                resolve();
+              } else {
+                reject('Expected "blue" in output, found: ' + actual);
+              }
+              p.remove();
+            }
+          };
+        });
+      });
+    });
+  });
+
+  suite('Grayscale', function() {
+    test('black fill should produce "black" color name', function() {
+      return new Promise(function(resolve, reject) {
+        new p5(function(p) {
+          p.setup = function() {
+            let cnv = p.createCanvas(100, 100);
+            cnv.id('testCanvas4');
+            p.gridOutput();
+            p.fill(0);
+            p.rect(0, 0, 50, 50);
+          };
+          p.draw = function() {
+            if (p.frameCount === 1) {
+              let actual = document.getElementById('testCanvas4gridOutputshape0')?.innerHTML || '';
+              if (actual.includes('black')) {
+                resolve();
+              } else {
+                reject('Expected "black" in output, found: ' + actual);
+              }
+              p.remove();
+            }
+          };
+        });
+      });
+    });
+
+    test('white fill should produce "white" color name', function() {
+      return new Promise(function(resolve, reject) {
+        new p5(function(p) {
+          p.setup = function() {
+            let cnv = p.createCanvas(100, 100);
+            cnv.id('testCanvas5');
+            p.background(0); // Black background to see white shape
+            p.gridOutput();
+            p.fill(255);
+            p.rect(0, 0, 50, 50);
+          };
+          p.draw = function() {
+            if (p.frameCount === 1) {
+              let actual = document.getElementById('testCanvas5gridOutputshape0')?.innerHTML || '';
+              if (actual.includes('white')) {
+                resolve();
+              } else {
+                reject('Expected "white" in output, found: ' + actual);
+              }
+              p.remove();
+            }
+          };
+        });
+      });
+    });
+
+    test('gray fill should produce "gray" color name', function() {
+      return new Promise(function(resolve, reject) {
+        new p5(function(p) {
+          p.setup = function() {
+            let cnv = p.createCanvas(100, 100);
+            cnv.id('testCanvas6');
+            p.gridOutput();
+            p.fill(128);
+            p.rect(0, 0, 50, 50);
+          };
+          p.draw = function() {
+            if (p.frameCount === 1) {
+              let actual = document.getElementById('testCanvas6gridOutputshape0')?.innerHTML || '';
+              if (actual.includes('gray')) {
+                resolve();
+              } else {
+                reject('Expected "gray" in output, found: ' + actual);
+              }
+              p.remove();
+            }
+          };
+        });
+      });
+    });
+  });
+
+  suite('Secondary Colors', function() {
+    test('yellow fill should produce "yellow" color name', function() {
+      return new Promise(function(resolve, reject) {
+        new p5(function(p) {
+          p.setup = function() {
+            let cnv = p.createCanvas(100, 100);
+            cnv.id('testCanvas7');
+            p.gridOutput();
+            p.fill(255, 255, 0);
+            p.rect(0, 0, 50, 50);
+          };
+          p.draw = function() {
+            if (p.frameCount === 1) {
+              let actual = document.getElementById('testCanvas7gridOutputshape0')?.innerHTML || '';
+              if (actual.includes('yellow')) {
+                resolve();
+              } else {
+                reject('Expected "yellow" in output, found: ' + actual);
+              }
+              p.remove();
+            }
+          };
+        });
+      });
+    });
+
+    test('cyan fill should produce "cyan" color name', function() {
+      return new Promise(function(resolve, reject) {
+        new p5(function(p) {
+          p.setup = function() {
+            let cnv = p.createCanvas(100, 100);
+            cnv.id('testCanvas8');
+            p.gridOutput();
+            p.fill(0, 255, 255);
+            p.rect(0, 0, 50, 50);
+          };
+          p.draw = function() {
+            if (p.frameCount === 1) {
+              let actual = document.getElementById('testCanvas8gridOutputshape0')?.innerHTML || '';
+              if (actual.includes('cyan')) {
+                resolve();
+              } else {
+                reject('Expected "cyan" in output, found: ' + actual);
+              }
+              p.remove();
+            }
+          };
+        });
+      });
+    });
+
+    test('magenta fill should produce "magenta" or "fuchsia" color name', function() {
+      return new Promise(function(resolve, reject) {
+        new p5(function(p) {
+          p.setup = function() {
+            let cnv = p.createCanvas(100, 100);
+            cnv.id('testCanvas9');
+            p.gridOutput();
+            p.fill(255, 0, 255);
+            p.rect(0, 0, 50, 50);
+          };
+          p.draw = function() {
+            if (p.frameCount === 1) {
+              let actual = document.getElementById('testCanvas9gridOutputshape0')?.innerHTML || '';
+              if (actual.includes('magenta') || actual.includes('fuchsia')) {
+                resolve();
+              } else {
+                reject('Expected "magenta" or "fuchsia" in output, found: ' + actual);
+              }
+              p.remove();
+            }
+          };
+        });
+      });
+    });
+  });
+});