diff --git a/docs/hc.md b/docs/hc.md
new file mode 100644
index 0000000000..70676fbd19
--- /dev/null
+++ b/docs/hc.md
@@ -0,0 +1,42 @@
+---
+layout: doc
+title: delite/hc
+---
+
+# delite/hc
+
+Provides "High Contrast" feature detection for accessibility purposes.
+
+This is useful for Internet Explorer and Firefox running on Windows.
+It doesn't apply to Chrome or Safari (on mobile, mac, or desktop), which don't support high contrast mode.
+
+## Introduction
+
+By doing a `require()` of `delite/hc`, `delite/hc` will set the `has("highcontrast")` flag
+so code can check directly whether or not it is in high contrast mode and branch appropriately.
+If the machine is in high contrast mode, `has("highcontrast")` is the text color being used by the browser
+(that overrides the text color defined in CSS rules).
+
+
+`delite/hc` will also add the `d-hc` CSS class to your document's `` tag if the machine is in high contrast mode.
+
+Normally this module should not be used. As long as widgets and applications avoid using background images for
+icons, the browser will do everything for high contrast mode automatically. The exception is for SVG,
+which the browser does not adjust.
+
+
+## Usage
+
+Simply require the module, and then reference `has("highcontrast")`:
+
+
+```js
+require (["delite/hc", ...), function (has, ...) {
+ ...
+ var hcColor = has("highcontrast");
+ if (hcColor) {
+ mySvgNode.style.color = hcColor;
+ }
+});
+```
+
diff --git a/docs/index.md b/docs/index.md
index d5c9757484..cce78d307e 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -35,6 +35,7 @@ Specifically, it's based on the following concepts:
* [a11y](a11y.md) - accessibility utility functions
* [a11yclick](a11yclick.md) - allow keyboard "click" (via ENTER or SPACE) on custom DOM nodes
* [handlebars!](handlebars.md) - plugin to compile reactive templates for use in widgets
+* [hc!](hc.md) - tests if OS is in high contrast mode
* [place](place.md) - low level module for placing a popup or dropdown at a certain position
* [popup](popup.md) - popup manager
* [register](register.md) - utility module for declaring new custom element types
diff --git a/hc.js b/hc.js
new file mode 100644
index 0000000000..e8caf1ab5f
--- /dev/null
+++ b/hc.js
@@ -0,0 +1,51 @@
+/**
+ * Test if computer is in high contrast mode (i.e. if CSS color settings are ignored)
+ * Defines `has("highcontrast")` and sets `d-hc` CSS class on `` if machine is in high contrast mode.
+ *
+ * Normally this code should not be used. As long as widgets or applications avoid using background images for
+ * icons, the browser will do everything for high contrast mode automatically. The exception is for SVG,
+ * which the browser does not adjust.
+ *
+ * If the OS is in high contrast mode and the browser obeys the OS setting,
+ * `has("highcontrast")` is the color that text appears as. Otherwise, `has("highcontrast")` is null.
+ *
+ * Module returns `has()` method.
+ *
+ * @module delite/hc
+ */
+define([
+ "requirejs-dplugins/has",
+ "requirejs-domready/domReady!"
+], function (has) {
+
+ has.add("highcontrast", function () {
+ if (typeof window === "undefined") {
+ return false;
+ }
+
+ // note: if multiple documents, doesn't matter which one we use
+ var div = document.createElement("div");
+ try {
+ div.style.cssText =
+ "border: 1px solid; border-color:red green; position: absolute; height: 5px; top: -999px;";
+ document.body.appendChild(div);
+
+ var cs = getComputedStyle(div);
+
+ // If it's high contrast mode then return the color and background color the browser is using.
+ // Otherwise just return null
+ return cs.borderTopColor === cs.borderRightColor ? cs.color : null;
+ } catch (e) {
+ console.warn("hccss: exception detecting high-contrast mode, document is likely hidden: " + e.toString());
+ return null;
+ } finally {
+ document.body.removeChild(div);
+ }
+ });
+
+ if (has("highcontrast")) {
+ document.body.className = (document.body.className + " d-hc").trim();
+ }
+
+ return has;
+});
diff --git a/tests/functional/hc.html b/tests/functional/hc.html
new file mode 100644
index 0000000000..098050d0be
--- /dev/null
+++ b/tests/functional/hc.html
@@ -0,0 +1,36 @@
+
+
+
+ high contrast detection test
+
+
+
+
+High Contrast Detection Test
+
+ Result: .
+
+
+ On Windows, setting the OS to high-contrast mode will make IE and FF ignore the CSS settings for
+ text color and size, and use the OS's settings instead (typically white on black or black on white).
+ Note that on Chrome, the OS setting is ignored.
+
+
+ Text with CSS settings for color:
+ red
+ green
+ blue
+
+
+