diff --git a/lib/mixins/color.js b/lib/mixins/color.js
index 42ce1b4c..ae7c14da 100644
--- a/lib/mixins/color.js
+++ b/lib/mixins/color.js
@@ -26,8 +26,8 @@ export default {
         }
         const hex = parseInt(color.slice(1), 16);
         color = [hex >> 16, (hex >> 8) & 0xff, hex & 0xff];
-      } else if (namedColors[color]) {
-        color = namedColors[color];
+      } else if (namedColors[color.toLowerCase()]) {
+        color = namedColors[color.toLowerCase()];
       } else if (this.spotColors[color]) {
         return this.spotColors[color];
       }
diff --git a/tests/unit/color.spec.js b/tests/unit/color.spec.js
index 49a17945..9e2a1215 100644
--- a/tests/unit/color.spec.js
+++ b/tests/unit/color.spec.js
@@ -27,6 +27,14 @@ describe('color', function () {
     ]);
   });
 
+  test('normalize named color case-insensitively', function () {
+    const doc = new PDFDocument();
+
+    expect(doc._normalizeColor('red')).toEqual([1, 0, 0]);
+    expect(doc._normalizeColor('Red')).toEqual([1, 0, 0]);
+    expect(doc._normalizeColor('RED')).toEqual([1, 0, 0]);
+  });
+
   test('normalize with spot color', function () {
     const doc = new PDFDocument();
     doc.addSpotColor('PANTONE 123 C', 0.1, 0.2, 0.3, 0.4);